1571d7195e
The purpose of black_box is to actually prevent the compiler from being able to optimize computation of the benchmarked function away. To accomplish this, we need to actually *use* black_box to blackbox the input data away, rather than the return type. Change-Id: I5438982f57509fbf7b85034346a2739d76aef1fa Reviewed-on: https://cl.tvl.fyi/c/depot/+/9902 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
36 lines
969 B
Rust
36 lines
969 B
Rust
use criterion::{black_box, criterion_group, criterion_main, Criterion};
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use itertools::Itertools;
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fn interpret(code: &str) {
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tvix_eval::Evaluation::new(code, None).evaluate();
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}
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fn eval_literals(c: &mut Criterion) {
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c.bench_function("int", |b| {
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b.iter(|| {
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interpret(black_box("42"));
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})
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});
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}
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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(|| {
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interpret(black_box("{ a = 1; b = 2; } // { c = 3; }"));
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})
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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 || {
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interpret(black_box(&expr));
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})
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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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