mirror of
https://github.com/hanzoai/next.js.git
synced 2026-10-30 14:46:38 +00:00
Luke SandbergandGitHub
f1899f3487
## Add `rcstr!` macro for efficient string literal handling ### What? This PR introduces a new `rcstr!` macro that creates `RcStr` instances from string literals, optimizing for inline storage when possible and using `LazyLock` for longer strings. ### Why? The `rcstr!` macro provides several benefits: - Allows compile-time evaluation of inline strings - Caches longer strings using `LazyLock` to avoid repeated allocations
56 lines
2.0 KiB
Rust
56 lines
2.0 KiB
Rust
use criterion::{BatchSize, BenchmarkId, Criterion, criterion_group, criterion_main};
|
|
use turbo_rcstr::{RcStr, rcstr};
|
|
|
|
// map has a fast-path if the Arc is uniquely owned
|
|
fn bench_map(c: &mut Criterion) {
|
|
let long_string = "this is a long string that will take time to copy".repeat(1000);
|
|
for cloned in [false, true] {
|
|
c.bench_with_input(
|
|
BenchmarkId::new("RcStr::map", if cloned { "cloned" } else { "unique" }),
|
|
&cloned,
|
|
|b, cloned| {
|
|
b.iter_batched(
|
|
|| {
|
|
let rc_str = RcStr::from(long_string.as_str());
|
|
let maybe_cloned = if *cloned { Some(rc_str.clone()) } else { None };
|
|
(rc_str, maybe_cloned)
|
|
},
|
|
|(mut rc_str, maybe_cloned)| {
|
|
rc_str = rc_str.map(|mut s| {
|
|
s.truncate(s.len() - 1);
|
|
s
|
|
});
|
|
// don't drop these ourselves, let criterion do that later
|
|
(rc_str, maybe_cloned)
|
|
},
|
|
BatchSize::LargeInput,
|
|
);
|
|
},
|
|
);
|
|
}
|
|
}
|
|
|
|
/// Compare the performance of `from` and `rcstr!`
|
|
fn bench_construct(c: &mut Criterion) {
|
|
let mut g = c.benchmark_group("Rcstr::construct");
|
|
g.bench_with_input("rcstr!/small", "small", |f, _| {
|
|
f.iter(|| rcstr!("hello"));
|
|
});
|
|
g.bench_with_input("rcstr!/large", "large", |f, _| {
|
|
f.iter(|| rcstr!("this is a long string that will take time to copy"));
|
|
});
|
|
|
|
g.bench_with_input("from/small", "small", |f, _| {
|
|
f.iter(|| RcStr::from("hello"));
|
|
});
|
|
g.bench_with_input("from/large", "large", |f, _| {
|
|
f.iter(|| RcStr::from("this is a long string that will take time to copy"));
|
|
});
|
|
}
|
|
criterion_group!(
|
|
name = benches;
|
|
config = Criterion::default();
|
|
targets = bench_map,bench_construct,
|
|
);
|
|
criterion_main!(benches);
|