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benchmarks for exponent fmt of integers

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This commit is contained in:
Pascal S. de Kloe
2025-08-22 17:40:48 +02:00
parent 6ba0ce4094
commit 2143a3f0c2
1 changed files with 24 additions and 0 deletions
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24
library/coretests/benches/fmt.rs
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@@ -342,3 +342,27 @@ fn write_i128_hex(bh: &mut Bencher) {
black_box(&mut buf).clear();
});
}
#[bench]
fn write_i64_exp(bh: &mut Bencher) {
let mut buf = String::with_capacity(1024);
bh.iter(|| {
write!(black_box(&mut buf), "{:e}", black_box(0_i64)).unwrap();
write!(black_box(&mut buf), "{:e}", black_box(100_i64)).unwrap();
write!(black_box(&mut buf), "{:e}", black_box(-100_i64)).unwrap();
write!(black_box(&mut buf), "{:e}", black_box(1_i64 << 32)).unwrap();
black_box(&mut buf).clear();
});
}
#[bench]
fn write_i128_exp(bh: &mut Bencher) {
let mut buf = String::with_capacity(1024);
bh.iter(|| {
write!(black_box(&mut buf), "{:e}", black_box(0_i128)).unwrap();
write!(black_box(&mut buf), "{:e}", black_box(100_i128)).unwrap();
write!(black_box(&mut buf), "{:e}", black_box(-100_i128)).unwrap();
write!(black_box(&mut buf), "{:e}", black_box(1_i128 << 64)).unwrap();
black_box(&mut buf).clear();
});
}