perf: cache system cell for resolve deps#2006
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doitian
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I think a more elegant solution is creating a wrapper around the resolver, like:
struct<F> CellProviderWithSystemCellCache {
system_cell: SystemCell,
inner: F,
}
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This PR is a draft for bench, I will improve it later.
But I think CellProvider is also a bad idea, this cache is for dep, not input.
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quake
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The goal of this PR is to optimize transaction resolve.
Currently, transaction resolve is inefficient, cause system-cell is uncached, every transaction depends on system cell will read system-cell from disk repeatedly. this PR proposal a system-cell cache implementation.