mirror of
https://github.com/rojo-rbx/rojo.git
synced 2026-10-22 21:41:37 +00:00
0e318b6b33
Replace `git status --porcelain -uall` with `git diff-index` (6x faster for tracked changes) and `git ls-files --others` for untracked files. Add mtime-based caching keyed on .git/index mtime, HEAD SHA, and tree mutation cursor to make repeated calls near-instant (~14ms vs ~1000ms). Empty changesets are never cached to ensure external file edits are always detected on the next query. Falls back to git status for repos with no commits (empty repo edge case).
165 lines
4.6 KiB
Rust
165 lines
4.6 KiB
Rust
use std::path::PathBuf;
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use std::process::Command;
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use std::time::Instant;
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use criterion::{criterion_group, criterion_main, Criterion};
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fn test_repo() -> PathBuf {
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let home = std::env::var("HOME").expect("HOME not set");
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let path = PathBuf::from(home).join("workspace/escape-tsunami-for-brainrots");
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assert!(
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path.join(".git").is_dir(),
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"Test repo not found at {}",
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path.display()
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);
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path
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}
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fn bench_git_status_uall(c: &mut Criterion) {
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let repo = test_repo();
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let mut group = c.benchmark_group("git_changed_files");
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group.sample_size(10);
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group.bench_function("git_status_porcelain_uall", |b| {
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b.iter(|| {
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Command::new("git")
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.args([
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"status",
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"--porcelain",
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"--no-renames",
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"-uall",
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"--",
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"src",
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])
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.current_dir(&repo)
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.output()
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.unwrap()
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})
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});
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group.bench_function("git_diff_index_HEAD", |b| {
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b.iter(|| {
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Command::new("git")
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.args([
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"--no-optional-locks",
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"diff-index",
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"--name-only",
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"HEAD",
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"--",
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"src",
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])
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.current_dir(&repo)
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.output()
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.unwrap()
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})
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});
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group.bench_function("git_ls_files_others", |b| {
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b.iter(|| {
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Command::new("git")
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.args([
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"--no-optional-locks",
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"ls-files",
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"--others",
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"--exclude-standard",
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"--",
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"src",
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])
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.current_dir(&repo)
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.output()
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.unwrap()
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})
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});
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group.bench_function("diff_index_plus_ls_files_parallel", |b| {
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b.iter(|| {
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let repo_a = repo.clone();
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let repo_b = repo.clone();
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std::thread::scope(|s| {
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let h1 = s.spawn(move || {
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Command::new("git")
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.args([
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"--no-optional-locks",
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"diff-index",
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"--name-only",
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"HEAD",
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"--",
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"src",
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])
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.current_dir(&repo_a)
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.output()
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.unwrap()
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});
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let h2 = s.spawn(move || {
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Command::new("git")
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.args([
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"--no-optional-locks",
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"ls-files",
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"--others",
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"--exclude-standard",
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"--",
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"src",
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])
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.current_dir(&repo_b)
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.output()
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.unwrap()
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});
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(h1.join().unwrap(), h2.join().unwrap())
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})
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})
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});
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group.bench_function("cache_staleness_check", |b| {
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b.iter(|| {
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let index_path = repo.join(".git/index");
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let mtime = std::fs::metadata(&index_path).unwrap().modified().unwrap();
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let head = Command::new("git")
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.args(["rev-parse", "HEAD"])
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.current_dir(&repo)
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.output()
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.unwrap();
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(mtime, head)
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})
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});
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group.finish();
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eprintln!("\n--- Quick wall-clock summary ---");
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let runs: &[(&str, &[&str])] = &[
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(
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"git status -uall (current)",
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&[
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"status",
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"--porcelain",
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"--no-renames",
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"-uall",
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"--",
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"src",
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],
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),
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(
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"git diff-index HEAD (new)",
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&[
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"--no-optional-locks",
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"diff-index",
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"--name-only",
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"HEAD",
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"--",
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"src",
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],
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),
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];
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for (label, args) in runs {
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let t = Instant::now();
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Command::new("git")
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.args(*args)
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.current_dir(&repo)
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.output()
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.unwrap();
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eprintln!(" {}: {}ms", label, t.elapsed().as_millis());
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}
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}
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criterion_group!(benches, bench_git_status_uall);
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criterion_main!(benches);
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