Opening a file is *very* slow on slow FSes

[sam-mccall]

TL;DR: On a slow network filesystem, opening files takes ~15x longer with helix than other editors such as vim. Helix is doing a bunch of blocking IO to detect git repos, it'd be nice to take this off the critical path or make it optional.

This is related to #6114 and #1987, but just opening files is painfully slow (e.g. when passing their path to hx on the command-line, or after using go-to-definition - there's no fuzzy-finding going on).

---

Looking at strace, helix is probing for several paths relative to ancestor directories: [commondir, HEAD (twice), tags/HEAD, heads/HEAD, remotes/HEAD, refs/remotes/HEAD/HEAD, .git]. I don't know what commondir is, the others all look git-related.

Details about this FS that help understand the log

(I don't think you should care about this filesystem per se, but just to give context for the logs - the idea that accessing a bunch of unexpected parts of a network FS might be slow generalizes I think).

On this particular system the layout is /weirdfs/username/workspace/pathinworkspace. The first time you use a particular workspace is really slow - time stat says ~600ms. I guess the FUSE client has to load a bunch of metadata. Fortunately you don't do this very often, and the metadata is cached. Trying to access a workspace that doesn't exist is also slow (~200ms), and can't be cached. Fortunately you never do this... except helix's VCS probes.

Most of these are fairly fast, but reading nonexistent files in certain directories is slow. On my example helix makes >100 openat calls, of which 22 are slow (most 200ms, some a bit longer) for a total of ~5 seconds. Because their nonexistence is not cacheable, this happens every time a file is opened.

trimmed log for `strace -tT hx /weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/cxx.bnf`

(This is lightly edited:/weirdfs isn't the real path etc. The log before this is all hx startup which is very fast, and after this it starts writing to the terminal)

16:20:17 getcwd("/weirdfs/sammccall/xkb/repo", 512) = 40 <0.000016>
16:20:17 statx(AT_FDCWD, "/usr/local/sbin/xclip", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9918b0) = -1 ENOENT (No such file or directory) <0.000013>
16:20:17 statx(AT_FDCWD, "/usr/local/bin/xclip", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9918b0) = -1 ENOENT (No such file or directory) <0.000016>
16:20:17 statx(AT_FDCWD, "/usr/sbin/xclip", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9918b0) = -1 ENOENT (No such file or directory) <0.000014>
16:20:17 statx(AT_FDCWD, "/usr/bin/xclip", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFREG|0755, stx_size=30736, ...}) = 0 <0.000017>
16:20:17 access("/usr/bin/xclip", X_OK) = 0 <0.000017>
16:20:17 statx(AT_FDCWD, "experimental/sammccall/grammar/cxx/cxx.bnf", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFREG|0664, stx_size=31436, ...}) = 0 <0.000141>
16:20:17 statx(AT_FDCWD, "experimental/sammccall/grammar/cxx/cxx.bnf", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFREG|0664, stx_size=31436, ...}) = 0 <0.000110>
16:20:17 getcwd("/weirdfs/sammccall/xkb/repo", 512) = 40 <0.000012>
16:20:17 readlink("/weirdfs", 0x7fffef991950, 1023) = -1 EINVAL (Invalid argument) <0.000128>
16:20:17 readlink("/weirdfs/sammccall", 0x7fffef991950, 1023) = -1 EINVAL (Invalid argument) <0.000115>
16:20:17 readlink("/weirdfs/sammccall/xkb", 0x7fffef991950, 1023) = -1 EINVAL (Invalid argument) <0.000053>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo", 0x7fffef991950, 1023) = -1 EINVAL (Invalid argument) <0.000129>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo/experimental", 0x7fffef991950, 1023) = -1 EINVAL (Invalid argument) <0.000115>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo/experimental/sammccall", 0x7fffef991950, 1023) = -1 EINVAL (Invalid argument) <0.000120>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar", 0x7fffef991950, 1023) = -1 EINVAL (Invalid argument) <0.000120>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx", 0x7fffef991950, 1023) = -1 EINVAL (Invalid argument) <0.000048>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/cxx.bnf", 0x7fffef991950, 1023) = -1 EINVAL (Invalid argument) <0.000121>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/cxx.bnf", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFREG|0664, stx_size=31436, ...}) = 0 <0.000125>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/cxx.bnf", O_RDONLY|O_CLOEXEC) = 10 <0.001305>
16:20:17 read(10, "# Omitted for now:\n# - attribute"..., 8192) = 8192 <0.000214>
16:20:17 read(10, "unary-expression := ALIGNOF ( ty"..., 8192) = 8192 <0.000024>
16:20:17 read(10, "pecifier\ntype-specifier := typen"..., 8192) = 8192 <0.000121>
16:20:17 read(10, ":= import-keyword header-name\ngl"..., 8192) = 6860 <0.000016>
16:20:17 read(10, "", 8192)             = 0 <0.000012>
16:20:17 close(10)                      = 0 <0.000139>
16:20:17 readlink("/weirdfs", 0x7fffef991690, 1023) = -1 EINVAL (Invalid argument) <0.000049>
16:20:17 readlink("/weirdfs/sammccall", 0x7fffef991690, 1023) = -1 EINVAL (Invalid argument) <0.000103>
16:20:17 readlink("/weirdfs/sammccall/xkb", 0x7fffef991690, 1023) = -1 EINVAL (Invalid argument) <0.000118>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo", 0x7fffef991690, 1023) = -1 EINVAL (Invalid argument) <0.000109>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo/experimental", 0x7fffef991690, 1023) = -1 EINVAL (Invalid argument) <0.000101>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo/experimental/sammccall", 0x7fffef991690, 1023) = -1 EINVAL (Invalid argument) <0.000059>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar", 0x7fffef991690, 1023) = -1 EINVAL (Invalid argument) <0.000115>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx", 0x7fffef991690, 1023) = -1 EINVAL (Invalid argument) <0.000108>
16:20:17 readlink("/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/cxx.bnf", 0x7fffef991690, 1023) = -1 EINVAL (Invalid argument) <0.000208>
16:20:17 brk(0x55927cecc000)            = 0x55927cecc000 <0.000044>
16:20:17 getcwd("/weirdfs/sammccall/xkb/repo", 512) = 40 <0.000039>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000331>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000095>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000131>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000198>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000184>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000174>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000191>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000215>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000181>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000174>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903b0) = -1 ENOENT (No such file or directory) <0.000192>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000088>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000113>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000158>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000133>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000201>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000179>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000157>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000149>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000166>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903b0) = -1 ENOENT (No such file or directory) <0.000161>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000123>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000120>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000161>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000186>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000171>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000175>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000153>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000168>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000162>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903b0) = -1 ENOENT (No such file or directory) <0.000215>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000132>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000100>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000158>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000152>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000167>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000162>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000179>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000144>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000170>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903b0) = -1 ENOENT (No such file or directory) <0.000156>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000184>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000095>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000137>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000220>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000165>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000172>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000162>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000126>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000189>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903b0) = -1 ENOENT (No such file or directory) <0.000173>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000118>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000121>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000148>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000153>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000156>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000152>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000150>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000172>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000156>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903b0) = -1 ENOENT (No such file or directory) <0.000163>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000112>
16:20:17 statx(AT_FDCWD, "/weirdfs/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000110>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.191226>
16:20:17 openat(AT_FDCWD, "/weirdfs/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.191615>
16:20:18 openat(AT_FDCWD, "/weirdfs/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.191353>
16:20:18 openat(AT_FDCWD, "/weirdfs/sammccall/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.191550>
16:20:18 openat(AT_FDCWD, "/weirdfs/sammccall/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.193934>
16:20:18 openat(AT_FDCWD, "/weirdfs/sammccall/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.191565>
16:20:18 openat(AT_FDCWD, "/weirdfs/sammccall/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.191614>
16:20:19 statx(AT_FDCWD, "/weirdfs/sammccall/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903b0) = -1 ENOENT (No such file or directory) <0.000190>
16:20:19 statx(AT_FDCWD, "/weirdfs", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0777, stx_size=0, ...}) = 0 <0.000154>
16:20:19 statx(AT_FDCWD, "/weirdfs", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0777, stx_size=0, ...}) = 0 <0.000227>
16:20:19 openat(AT_FDCWD, "/weirdfs/commondir", O_RDONLY|O_CLOEXEC) = 10 <0.000450>
16:20:19 statx(10, "", AT_STATX_SYNC_AS_STAT|AT_EMPTY_PATH, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000136>
16:20:19 statx(10, "", AT_STATX_SYNC_AS_STAT|AT_EMPTY_PATH, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000164>
16:20:19 lseek(10, 0, SEEK_CUR)         = 0 <0.000022>
16:20:19 read(10, 0x55927ce717b0, 512)  = -1 EISDIR (Is a directory) <0.000021>
16:20:19 close(10)                      = 0 <0.000028>
16:20:19 openat(AT_FDCWD, "/weirdfs/HEAD", O_RDONLY|O_CLOEXEC) = 10 <0.000294>
16:20:19 statx(10, "", AT_STATX_SYNC_AS_STAT|AT_EMPTY_PATH, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000128>
16:20:19 lseek(10, 0, SEEK_CUR)         = 0 <0.000022>
16:20:19 read(10, 0x55927ce84710, 128)  = -1 EISDIR (Is a directory) <0.000021>
16:20:19 statx(AT_FDCWD, "/weirdfs/HEAD", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000124>
16:20:19 close(10)                      = 0 <0.000023>
16:20:19 openat(AT_FDCWD, "/weirdfs/HEAD", O_RDONLY|O_CLOEXEC) = 10 <0.000208>
16:20:19 statx(10, "", AT_STATX_SYNC_AS_STAT|AT_EMPTY_PATH, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000142>
16:20:19 lseek(10, 0, SEEK_CUR)         = 0 <0.000021>
16:20:19 read(10, 0x55927ce84710, 128)  = -1 EISDIR (Is a directory) <0.000019>
16:20:19 statx(AT_FDCWD, "/weirdfs/HEAD", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000124>
16:20:19 close(10)                      = 0 <0.000024>
16:20:19 openat(AT_FDCWD, "/weirdfs/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.301772>
16:20:19 openat(AT_FDCWD, "/weirdfs/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.428781>
16:20:19 openat(AT_FDCWD, "/weirdfs/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.296646>
16:20:20 openat(AT_FDCWD, "/weirdfs/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.298887>
16:20:20 statx(AT_FDCWD, "/weirdfs/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903b0) = -1 ENOENT (No such file or directory) <0.000182>
16:20:20 statx(AT_FDCWD, "/etc/localtime", AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_ALL, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFLNK|0777, stx_size=33, ...}) = 0 <0.000026>
16:20:20 write(9, "2023-04-24T16:20:20.405 helix_vc"..., 292) = 292 <0.000048>
16:20:20 write(9, "2023-04-24T16:20:20.406 helix_vc"..., 154) = 154 <0.000026>
16:20:20 getcwd("/weirdfs/sammccall/xkb/repo", 512) = 40 <0.000023>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.001493>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000165>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000134>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000185>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000226>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000204>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000188>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000170>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000166>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000197>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/cxx/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903a0) = -1 ENOENT (No such file or directory) <0.000167>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000128>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000155>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000170>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000165>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000164>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000172>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000167>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000164>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000170>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/grammar/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903a0) = -1 ENOENT (No such file or directory) <0.000208>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000090>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000131>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000165>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000179>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000182>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000187>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000152>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000170>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000152>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/sammccall/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903a0) = -1 ENOENT (No such file or directory) <0.000172>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000138>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000147>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000184>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000165>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000176>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000164>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000147>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000156>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000104>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/experimental/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903a0) = -1 ENOENT (No such file or directory) <0.000165>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000108>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000131>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000158>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000153>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000174>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000176>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000161>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000149>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000166>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/repo/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903a0) = -1 ENOENT (No such file or directory) <0.000183>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000123>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000156>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000161>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000125>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000174>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000163>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000146>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000147>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/xkb/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000137>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall/xkb/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903a0) = -1 ENOENT (No such file or directory) <0.000197>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000108>
16:20:20 statx(AT_FDCWD, "/weirdfs/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000131>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.368557>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.192890>
16:20:20 openat(AT_FDCWD, "/weirdfs/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.193549>
16:20:21 openat(AT_FDCWD, "/weirdfs/sammccall/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.191203>
16:20:21 openat(AT_FDCWD, "/weirdfs/sammccall/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.194199>
16:20:21 openat(AT_FDCWD, "/weirdfs/sammccall/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.191563>
16:20:21 openat(AT_FDCWD, "/weirdfs/sammccall/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.192426>
16:20:21 statx(AT_FDCWD, "/weirdfs/sammccall/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903a0) = -1 ENOENT (No such file or directory) <0.000183>
16:20:21 statx(AT_FDCWD, "/weirdfs", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0777, stx_size=0, ...}) = 0 <0.000189>
16:20:21 statx(AT_FDCWD, "/weirdfs", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0777, stx_size=0, ...}) = 0 <0.000165>
16:20:21 openat(AT_FDCWD, "/weirdfs/commondir", O_RDONLY|O_CLOEXEC) = 10 <0.000445>
16:20:21 statx(10, "", AT_STATX_SYNC_AS_STAT|AT_EMPTY_PATH, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000130>
16:20:21 statx(10, "", AT_STATX_SYNC_AS_STAT|AT_EMPTY_PATH, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000150>
16:20:21 lseek(10, 0, SEEK_CUR)         = 0 <0.000019>
16:20:21 read(10, 0x55927ccb5e80, 512)  = -1 EISDIR (Is a directory) <0.000024>
16:20:21 close(10)                      = 0 <0.000025>
16:20:21 openat(AT_FDCWD, "/weirdfs/HEAD", O_RDONLY|O_CLOEXEC) = 10 <0.000317>
16:20:21 statx(10, "", AT_STATX_SYNC_AS_STAT|AT_EMPTY_PATH, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000132>
16:20:21 lseek(10, 0, SEEK_CUR)         = 0 <0.000019>
16:20:21 read(10, 0x55927ce84710, 128)  = -1 EISDIR (Is a directory) <0.000019>
16:20:21 statx(AT_FDCWD, "/weirdfs/HEAD", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000128>
16:20:21 close(10)                      = 0 <0.000022>
16:20:21 openat(AT_FDCWD, "/weirdfs/HEAD", O_RDONLY|O_CLOEXEC) = 10 <0.000182>
16:20:21 statx(10, "", AT_STATX_SYNC_AS_STAT|AT_EMPTY_PATH, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000130>
16:20:21 lseek(10, 0, SEEK_CUR)         = 0 <0.000023>
16:20:21 read(10, 0x55927ce84710, 128)  = -1 EISDIR (Is a directory) <0.000031>
16:20:21 statx(AT_FDCWD, "/weirdfs/HEAD", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000121>
16:20:21 close(10)                      = 0 <0.000023>
16:20:21 openat(AT_FDCWD, "/weirdfs/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.300257>
16:20:22 openat(AT_FDCWD, "/weirdfs/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.351909>
16:20:22 openat(AT_FDCWD, "/weirdfs/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.445647>
16:20:23 openat(AT_FDCWD, "/weirdfs/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.310794>
16:20:23 statx(AT_FDCWD, "/weirdfs/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fffef9903a0) = -1 ENOENT (No such file or directory) <0.000500>
16:20:23 statx(AT_FDCWD, "/etc/localtime", AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_ALL, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFLNK|0777, stx_size=33, ...}) = 0 <0.000042>
16:20:23 write(9, "2023-04-24T16:20:23.364 helix_vc"..., 292) = 292 <0.000047>
16:20:23 write(9, "2023-04-24T16:20:23.365 helix_vc"..., 164) = 164 <0.000025>
16:20:23 socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0, [10, 11]) = 0 <0.000054>

[sam-mccall]

I'd really like to be able to use helix out-of-the-box in arbitrary environments, so if fundamental operations like opening a file are going to probe the FS it would be nice to do it in a non-blocking and resilient way.
(To some extent this includes interactive :o, which is #6114).

That said, being able to disable probing behavior on certain paths would definitely work for my use case, and being able to disable it entirely would be better than nothing.

Finally, it seems surprising that it has to probe so many suffixes - if this was just probing one suffix it would be a lot less painful.

[archseer]

I think our detection algorithm comes straight from gix (plus we search recursively in parent folders)

[archseer]

@pascalkuthe it seems to me that polling for HEAD in current dir, heads/HEAD etc would be an edge case though, in 99% of cases there will be a .git subdirectory. We don't care about bare repositories

[pascalkuthe]

I don't think gitoxide will want to add a "cropped" version of the repo detection algorithm (and I personally do use bare repos for working on helix). think the real fix is to just make this run async (maybe with a timeout). I wanted to do that anyway once we have file watching.

[archseer]

Do we need the gitoxide algorithm though? Scanning for .git should cover most cases

[pascalkuthe]

You can just open a repo directly but I am not sure if that works with detached worktrees (which are somewhat commonly used). I can try to optimize this. What we do right now is the same a call to the git CLI would do.

I would assume that recursive .git scan would still be slow on such a slow fs tough (since .git wouldn't exist most of the time) so doing this scan async and eventually caching the workspace/.git lookup (we do the workspace detection everytime we start an lsp, open the file picker or open file) will probably improve things much more. I wanted to cache git repos anyway.

[sam-mccall]

FWIW I ran an strace on git status in the same dir. It looks at [.git, .git/HEAD, HEAD] relative to ancestors, so 3 paths instead of 8.
git also uses newfstatat instead of openat, and stats the ancestor directory itself. Neither of these matter in this case at least.

(As it happens, only the stat of /weirdfs/sammccall/HEAD is slow, so overall latency is <300ms. I suspect the FS has some special handling and knows quickly that .git is not a valid username or workspace name! This quirk isn't worth worrying about, other than the idea that doing exactly what git does is probably going to work well, because someone will have tested it).

All the ideas mentioned (async, caching, fewer lookups) sound like they would help a lot.

[pascalkuthe]

Rust has no ergonomic interface for calling fstatat so that's pretty hard to change and probably not worth doing judt for the directory lookup. Not sure about looking at more directories that's probably intentional.

Cc @Byron

[Byron]

Thanks for letting me chime in! gitoxide's detection algorithm should not probe files unnecessarily, nor should it ultimately be slower than what git does. helix uses discover to find the containing git repository, and that should really be fast. Something that I found odd was seeing refs/remotes/HEAD/HEAD probed, and maybe all of this points to gitoxide needing to improve in that realm.

Maybe you can compare the straces of gix exclude query file with git check-ignore -vn file. Then we'd see if gix does too much and I would have a little more to go by. I'd also run this on my VM, but I'd love to see how things work in your particular setup.

Thanks for your help, it's much appreciated 🙏.

[sam-mccall]

Thanks @Byron!
Results are similar to what I saw through invoking hx and git above: gix checks 8 suffixes (including HEAD twice), git checks 3.

git check-ignore -vn cxx.bnf (32 stats, ~0.2s)

11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/grammar/cxx", {st_mode=S_IFDIR|0775, st_size=0, ...}, 0) = 0 <0.000881>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/grammar/cxx/.git", 0x7fffe4739260, 0) = -1 ENOENT (No such file or directory) <0.067965>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/grammar/cxx/.git/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000308>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/grammar/cxx/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000206>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/grammar", {st_mode=S_IFDIR|0775, st_size=0, ...}, 0) = 0 <0.000137>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/grammar/.git", 0x7fffe4739260, 0) = -1 ENOENT (No such file or directory) <0.000268>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/grammar/.git/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000143>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/grammar/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000168>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall", {st_mode=S_IFDIR|0775, st_size=0, ...}, 0) = 0 <0.000129>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/.git", 0x7fffe4739260, 0) = -1 ENOENT (No such file or directory) <0.000166>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/.git/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000161>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/sammccall/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000163>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental", {st_mode=S_IFDIR|0775, st_size=0, ...}, 0) = 0 <0.000126>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/.git", 0x7fffe4739260, 0) = -1 ENOENT (No such file or directory) <0.000163>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/.git/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000154>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/experimental/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000126>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo", {st_mode=S_IFDIR|0775, st_size=0, ...}, 0) = 0 <0.000118>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/.git", 0x7fffe4739260, 0) = -1 ENOENT (No such file or directory) <0.000161>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/.git/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000158>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/repo/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000166>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean", {st_mode=S_IFDIR|0775, st_size=0, ...}, 0) = 0 <0.000119>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/.git", 0x7fffe4739260, 0) = -1 ENOENT (No such file or directory) <0.052788>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/.git/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000299>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/clean/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000230>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall", {st_mode=S_IFDIR|0775, st_size=0, ...}, 0) = 0 <0.000163>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/.git", 0x7fffe4739260, 0) = -1 ENOENT (No such file or directory) <0.000153>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/.git/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000133>
11:28:22 newfstatat(AT_FDCWD, "/weirdfs/sammccall/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.209315>
11:28:23 newfstatat(AT_FDCWD, "/weirdfs", {st_mode=S_IFDIR|0777, st_size=0, ...}, 0) = 0 <0.000195>
11:28:23 newfstatat(AT_FDCWD, "/weirdfs/.git", 0x7fffe4739260, 0) = -1 ENOENT (No such file or directory) <0.000108>
11:28:23 newfstatat(AT_FDCWD, "/weirdfs/.git/HEAD", 0x7fffe4739120, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory) <0.000101>
11:28:23 newfstatat(AT_FDCWD, "/weirdfs/HEAD", {st_mode=S_IFDIR|0775, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 <0.000320>

gix exclude query cxx.bnf (23 stats, 43 opens, ~1.4s)

11:36:34 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/grammar", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000880>
11:36:34 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/grammar", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000060>
11:36:34 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/grammar/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000168>
11:36:34 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/grammar/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000219>
11:36:34 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/grammar/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000165>
11:36:34 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/grammar/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000260>
11:36:34 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/grammar/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000142>
11:36:34 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/grammar/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000151>
11:36:34 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/grammar/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000181>
11:36:34 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/grammar/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7ffcc17bac10) = -1 ENOENT (No such file or directory) <0.000159>
11:36:34 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000136>
11:36:34 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000119>
11:36:34 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000161>
11:36:34 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000119>
11:36:34 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000176>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000163>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000168>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000179>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000170>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/sammccall/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7ffcc17bac10) = -1 ENOENT (No such file or directory) <0.000180>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000179>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000134>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000160>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000125>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000141>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000115>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000167>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000156>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000178>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/experimental/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7ffcc17bac10) = -1 ENOENT (No such file or directory) <0.000152>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000113>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000075>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000159>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000152>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000155>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000147>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000136>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000105>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000151>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/repo/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7ffcc17bac10) = -1 ENOENT (No such file or directory) <0.000173>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall/clean2", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000113>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall/clean2", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000107>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.045372>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000167>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000201>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000179>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000170>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000162>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/clean2/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.000157>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall/clean2/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7ffcc17bac10) = -1 ENOENT (No such file or directory) <0.000119>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000134>
11:36:35 statx(AT_FDCWD, "/weirdfs/sammccall", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0775, stx_size=0, ...}) = 0 <0.000115>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/commondir", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.208847>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.190773>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.192313>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/tags/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.195357>
11:36:35 openat(AT_FDCWD, "/weirdfs/sammccall/heads/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.192372>
11:36:36 openat(AT_FDCWD, "/weirdfs/sammccall/remotes/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.193387>
11:36:36 openat(AT_FDCWD, "/weirdfs/sammccall/refs/remotes/HEAD/HEAD", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) <0.192397>
11:36:36 statx(AT_FDCWD, "/weirdfs/sammccall/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7ffcc17bac10) = -1 ENOENT (No such file or directory) <0.000239>
11:36:36 statx(AT_FDCWD, "/weirdfs", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0777, stx_size=0, ...}) = 0 <0.000191>
11:36:36 statx(AT_FDCWD, "/weirdfs", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0777, stx_size=0, ...}) = 0 <0.000151>
11:36:36 openat(AT_FDCWD, "/weirdfs/commondir", O_RDONLY|O_CLOEXEC) = 3 <0.000377>

(Random aside: git could be faster here too, it appears to check .git/HEAD even after .git doesn't exist)

[pascalkuthe]

@sam-mccall #6882 should reduce the stat calls by a decent amount. I still want to cache repos/do that async but that's more work

[Byron]

Thanks so much @sam-mccall !

Would it be possible for you to try this PR and share the stat calls?

I also tried it myself and got this:

statx(AT_FDCWD, ".", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=4096, ...}) = 0
statx(AT_FDCWD, "./.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0xffffc044cf50) = -1 ENOENT (No such file or directory)
statx(0, NULL, AT_STATX_SYNC_AS_STAT, STATX_ALL, NULL) = -1 EFAULT (Bad address)
statx(AT_FDCWD, "./HEAD", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0xffffc044c790) = -1 ENOENT (No such file or directory)
statx(AT_FDCWD, "/home/parallels", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=4096, ...}) = 0
statx(AT_FDCWD, "/home/parallels/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0xffffc044cf50) = -1 ENOENT (No such file or directory)
statx(AT_FDCWD, "/home/parallels/HEAD", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0xffffc044c790) = -1 ENOENT (No such file or directory)
statx(AT_FDCWD, "/home", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=4096, ...}) = 0
statx(AT_FDCWD, "/home/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0xffffc044cf50) = -1 ENOENT (No such file or directory)
statx(AT_FDCWD, "/home/HEAD", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0xffffc044c790) = -1 ENOENT (No such file or directory)
statx(AT_FDCWD, "/", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=STATX_ATTR_MOUNT_ROOT, stx_mode=S_IFDIR|0755, stx_size=4096, ...}) = 0
statx(AT_FDCWD, "/.git", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0xffffc044cf50) = -1 ENOENT (No such file or directory)
statx(AT_FDCWD, "/HEAD", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0xffffc044c790) = -1 ENOENT (No such file or directory)

I think that should be the optimal search sequence for a universal search that supports bare repo discovery :).