mirror of https://github.com/rust-lang/cargo
add a bench for workspace initialization
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@ -10,6 +10,7 @@ description = "Benchmarking suite for Cargo."
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[dependencies]
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cargo = { path = "../.." }
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cargo-test-support = { path = "../../crates/cargo-test-support" }
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# Consider removing html_reports in 0.4 and switching to `cargo criterion`.
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criterion = { version = "0.3.5", features = ["html_reports"] }
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flate2 = { version = "1.0.3", default-features = false, features = ["zlib"] }
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@ -22,3 +23,7 @@ bench = false
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[[bench]]
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name = "resolve"
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harness = false
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[[bench]]
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name = "workspace_initialization"
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harness = false
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@ -0,0 +1,27 @@
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use benchsuite::fixtures;
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use cargo::core::Workspace;
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use criterion::{criterion_group, criterion_main, Criterion};
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fn workspace_initialization(c: &mut Criterion) {
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let fixtures = fixtures!();
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let mut group = c.benchmark_group("workspace_initialization");
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for (ws_name, ws_root) in fixtures.workspaces() {
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let config = fixtures.make_config(&ws_root);
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// The resolver info is initialized only once in a lazy fashion. This
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// allows criterion to skip this workspace if the user passes a filter
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// on the command-line (like `cargo bench -- workspace_initialization/tikv`).
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group.bench_function(ws_name, |b| {
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b.iter(|| Workspace::new(&ws_root.join("Cargo.toml"), &config).unwrap())
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});
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}
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group.finish();
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}
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// Criterion complains about the measurement time being too small, but the
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// measurement time doesn't seem important to me, what is more important is
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// the number of iterations which defaults to 100, which seems like a
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// reasonable default. Otherwise, the measurement time would need to be
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// changed per workspace. We wouldn't want to spend 60s on every workspace,
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// that would take too long and isn't necessary for the smaller workspaces.
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criterion_group!(benches, workspace_initialization);
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criterion_main!(benches);
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