uv/crates/uv-distribution-types
konsti ae916cff5a
Reduce overhead in converting resolutions (#11660)
Solving spent a chunk of its time just converting resolutions, the left
two blocks:


![image](https://github.com/user-attachments/assets/6f266440-c6e2-447c-ad7f-f92244f9d09b)

These blocks are `ResolverOutput::from_state` with 1.3% and
`ForkState::into_resolution` with 4.1% of resolver thread runtime for
apache airflow universal.

We reduce the overhead spent in those functions, to now 1.1% and 2.1% of
resolver time spend in those functions by:

Commit 1: Replace the hash set for the edges with a vec in
`ForkState::into_resolution`. We deduplicate edges anyway when
collecting them, and the hash-and-insert was slow.

Commit 2: Reduce the distribution clonign in
`ResolverOutput::from_state` by using an `Arc`.

The same profile excerpt for the resolver with the branch (note that
there is now an unrelated block between the two we optimized):


![image](https://github.com/user-attachments/assets/e36c205d-2cf8-4fe6-a2dd-3020c0515922)

Wall times are noisy, but the profiles show those changes as
improvements.

```
$ hyperfine --warmup 2 "./uv-main pip compile --no-progress scripts/requirements/airflow.in --universal" "./uv-branch pip compile --no-progress scripts/requirements/airflow.in --universal"
Benchmark 1: ./uv-main pip compile --no-progress scripts/requirements/airflow.in --universal
  Time (mean ± σ):      99.1 ms ±   3.8 ms    [User: 111.8 ms, System: 115.5 ms]
  Range (min … max):    93.6 ms … 110.4 ms    29 runs
 
Benchmark 2: ./uv-branch pip compile --no-progress scripts/requirements/airflow.in --universal
  Time (mean ± σ):      97.1 ms ±   4.3 ms    [User: 114.8 ms, System: 112.0 ms]
  Range (min … max):    90.9 ms … 112.4 ms    29 runs
 
Summary
  ./uv-branch pip compile --no-progress scripts/requirements/airflow.in --universal ran
    1.02 ± 0.06 times faster than ./uv-main pip compile --no-progress scripts/requirements/airflow.in --universal
```
2025-02-20 12:13:01 -08:00
..
src Reduce overhead in converting resolutions (#11660) 2025-02-20 12:13:01 -08:00
Cargo.toml Split uv-git and uv-git-types (#11448) 2025-02-17 10:37:55 +01:00