uv/crates/uv-cli
konsti 5b27decbe7
Build backend: Add fast path (#9556)
Going through PEP 517 to build a package is slow, so when building a
package with the uv build backend, we can call into the uv build backend
directly. This is the basis for the `uv build --list`.

This does not enable the fast path for general source dependencies.

There is a possible difference in execution if the latest uv version is
newer than the one currently running: The PEP 517 path would use the
latest version, while the fast path uses the current version.

Please review commit-by-commit

### Benchmark

`built_with_uv`, using the fast path:
```
$ hyperfine "~/projects/uv/target/profiling/uv build"
Time (mean ± σ):       9.2 ms ±   1.1 ms    [User: 4.6 ms, System: 4.6 ms]
Range (min … max):     6.4 ms …  12.7 ms    290 runs
```

`hatcling_editable`, with hatchling being optimized for fast startup
times:
```
$ hyperfine "~/projects/uv/target/profiling/uv build"
Time (mean ± σ):     270.5 ms ±  18.4 ms    [User: 230.8 ms, System: 44.5 ms]
Range (min … max):   250.7 ms … 298.4 ms    10 runs
```
2024-12-02 15:37:50 +00:00
..
src Build backend: Add fast path (#9556) 2024-12-02 15:37:50 +00:00
build.rs chore(uv): more env var mappings (#8193) 2024-10-15 07:59:03 -04:00
Cargo.toml chore(uv): more env var mappings (#8193) 2024-10-15 07:59:03 -04:00