Signed int key benchmarks

[maurolacy]

Just an exercise to confirm the different methods of doing to-cw-bytes are not incurring a significant performance loss.

Not sure this needs to be merged. Published for reference.

[ueco-jb]

I like it.
I wonder if there's some feasible way to present those results in good way? Criterion prints a lot, and I personally use CircleCI as rare as possible.

[ueco-jb]

👍 for filtering, although I would still cut that list a little bit shorter.
Maybe remove release tag branches, since they are basically always directly derived from main anyway?

[maurolacy]

I wonder if there's some feasible way to present those results in good way? Criterion prints a lot, and I personally use CircleCI as rare as possible.

You mean, besides cargo bench default output? There a number of options for displaying results (see https://doc.rust-lang.org/cargo/commands/cargo-bench.html#display-options), but now sure how to use them.

That said, -- --output-format bencher produces a terser output.