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string.rs
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/
string.rs
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// std imports
use std::alloc::System;
// third-party imports
use criterion::{criterion_group, criterion_main, Criterion};
use stats_alloc::{StatsAlloc, INSTRUMENTED_SYSTEM};
use std::hint::black_box;
#[global_allocator]
static GLOBAL: &StatsAlloc<System> = &INSTRUMENTED_SYSTEM;
fn benchmark(c: &mut Criterion) {
let mut c = c.benchmark_group("string");
let prefix = String::from("_");
c.bench_function("string-short-match", |b| {
let what = String::from("_TEST");
b.iter(|| {
assert_eq!(black_box(&what).starts_with(black_box(&prefix)), true);
});
});
c.bench_function("string-long-match", |b| {
let what = String::from("_TEST_SOME_VERY_VERY_LONG_NAME");
b.iter(|| {
assert_eq!(black_box(&what).starts_with(black_box(&prefix)), true);
});
});
c.bench_function("string-short-non-match", |b| {
let what = String::from("TEST");
b.iter(|| {
assert_eq!(black_box(&what).starts_with(black_box(&prefix)), false);
});
});
c.bench_function("string-long-non-match", |b| {
let what = String::from("TEST_SOME_VERY_VERY_LONG_NAME");
b.iter(|| {
assert_eq!(black_box(&what).starts_with(black_box(&prefix)), false);
});
});
c.bench_function("string-long-prefix-match", |b| {
let prefix = String::from("TEST_SOME_VERY_VERY_LONG_PREFIX_");
let what = String::from("TEST_SOME_VERY_VERY_LONG_PREFIX_AND_SOMEWHAT");
b.iter(|| {
assert_eq!(black_box(&what).starts_with(black_box(&prefix)), true);
});
});
}
criterion_group!(benches, benchmark);
criterion_main!(benches);