test(tvix/eval): Add attr merge benchmarks
Add a quick couple of benchmarks for merging attribute sets, large and small. Change-Id: I26940a9cf4e0d30e3d9eb07a7b8c366ca4072ca3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6286 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su> Autosubmit: grfn <grfn@gws.fyi>
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					 3 changed files with 19 additions and 1 deletions
				
			
		
							
								
								
									
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			@ -874,6 +874,7 @@ version = "0.1.0"
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dependencies = [
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 "criterion",
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 "dirs",
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 "itertools",
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 "path-clean",
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 "pretty_assertions",
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 "rnix",
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			@ -23,6 +23,7 @@ rev = "614e7d4641e83ab7eb321d9ac5e3d12985f9f3ba"
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criterion = "0.3.6"
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test-generator = "0.3.0"
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pretty_assertions = "1.2.1"
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itertools = "0.10.3"
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[features]
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# Enables running the Nix language test suite from the original C++
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			@ -1,9 +1,25 @@
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use criterion::{black_box, criterion_group, criterion_main, Criterion};
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use itertools::Itertools;
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use tvix_eval::interpret;
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fn eval_literals(c: &mut Criterion) {
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    c.bench_function("int", |b| b.iter(|| black_box(interpret("42", None))));
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}
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criterion_group!(benches, eval_literals);
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fn eval_merge_attrs(c: &mut Criterion) {
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    c.bench_function("merge small attrs", |b| {
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        b.iter(|| black_box(interpret("{ a = 1; b = 2; } // { c = 3; }", None)))
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    });
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    c.bench_function("merge large attrs with small attrs", |b| {
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        let large_attrs = format!(
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            "{{{}}}",
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            (0..10000).map(|n| format!("a{n} = {n};")).join(" ")
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        );
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        let expr = format!("{large_attrs} // {{ c = 3; }}");
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        b.iter(move || black_box(interpret(&expr, None)))
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    });
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}
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criterion_group!(benches, eval_literals, eval_merge_attrs);
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criterion_main!(benches);
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