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a935a4f70c
In snapshot(), changed_file_states are received in arbitrary order. For the
other callers, entries are in diff_stream order, so we don't have to sort
them.
With watchman enabled, we can see the cost of sorting the sorted proto entries.
I don't think this is significant, but we can mitigate it by adding
is_file_states_sorted flag to the proto message if needed:
```
% hyperfine --sort command --warmup 3 --runs 20 -L bin jj-0,jj-1 \
"target/release-with-debug/{bin} -R ~/mirrors/linux files ~/mirrors/linux/no-match"
Benchmark 1: target/release-with-debug/jj-0 -R ~/mirrors/linux files ~/mirrors/linux/no-match
Time (mean ± σ): 164.8 ms ± 16.6 ms [User: 50.2 ms, System: 111.7 ms]
Range (min … max): 148.1 ms … 195.0 ms 20 runs
Benchmark 2: target/release-with-debug/jj-1 -R ~/mirrors/linux files ~/mirrors/linux/no-match
Time (mean ± σ): 171.8 ms ± 13.6 ms [User: 61.7 ms, System: 109.0 ms]
Range (min … max): 159.5 ms … 192.1 ms 20 runs
```
Without watchman:
```
% hyperfine --sort command --warmup 3 --runs 20 -L bin jj-0,jj-1 \
"target/release-with-debug/{bin} -R ~/mirrors/linux files ~/mirrors/linux/no-match"
Benchmark 1: target/release-with-debug/jj-0 -R ~/mirrors/linux files ~/mirrors/linux/no-match
Time (mean ± σ): 367.3 ms ± 30.3 ms [User: 1415.2 ms, System: 633.8 ms]
Range (min … max): 325.4 ms … 421.7 ms 20 runs
Benchmark 2: target/release-with-debug/jj-1 -R ~/mirrors/linux files ~/mirrors/linux/no-match
Time (mean ± σ): 327.7 ms ± 24.9 ms [User: 1059.1 ms, System: 654.3 ms]
Range (min … max): 296.0 ms … 385.4 ms 20 runs
```
I haven't measured snapshotting against dirty working copy, but I don't think
it would be slower than the original implementation.
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| .. | ||
| benches | ||
| gen-protos | ||
| src | ||
| tests | ||
| testutils | ||
| Cargo.toml | ||
| LICENSE | ||