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Rollup merge of #56126 - Turbo87:bench-parse, r=alexcrichton

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core/benches/num: Add `from_str/from_str_radix()` benchmarks

This was extracted from #55973

/cc @alexcrichton
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Guillaume Gomez 2018-11-22 10:37:56 +01:00 committed by GitHub
commit 61d7b3e9b0
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105
src/libcore/benches/num/mod.rs
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@ -10,3 +10,108 @@
mod flt2dec;
mod dec2flt;
use test::Bencher;
use std::str::FromStr;
const ASCII_NUMBERS: [&str; 19] = [
"0",
"1",
"2",
"43",
"765",
"76567",
"987245987",
"-4aa32",
"1786235",
"8723095",
"f##5s",
"83638730",
"-2345",
"562aa43",
"-1",
"-0",
"abc",
"xyz",
"c0ffee",
];
macro_rules! from_str_bench {
($mac:ident, $t:ty) => (
#[bench]
fn $mac(b: &mut Bencher) {
b.iter(|| {
ASCII_NUMBERS
.iter()
.cycle()
.take(5_000)
.filter_map(|s| <($t)>::from_str(s).ok())
.max()
})
}
)
}
macro_rules! from_str_radix_bench {
($mac:ident, $t:ty, $radix:expr) => (
#[bench]
fn $mac(b: &mut Bencher) {
b.iter(|| {
ASCII_NUMBERS
.iter()
.cycle()
.take(5_000)
.filter_map(|s| <($t)>::from_str_radix(s, $radix).ok())
.max()
})
}
)
}
from_str_bench!(bench_u8_from_str, u8);
from_str_radix_bench!(bench_u8_from_str_radix_2, u8, 2);
from_str_radix_bench!(bench_u8_from_str_radix_10, u8, 10);
from_str_radix_bench!(bench_u8_from_str_radix_16, u8, 16);
from_str_radix_bench!(bench_u8_from_str_radix_36, u8, 36);
from_str_bench!(bench_u16_from_str, u16);
from_str_radix_bench!(bench_u16_from_str_radix_2, u16, 2);
from_str_radix_bench!(bench_u16_from_str_radix_10, u16, 10);
from_str_radix_bench!(bench_u16_from_str_radix_16, u16, 16);
from_str_radix_bench!(bench_u16_from_str_radix_36, u16, 36);
from_str_bench!(bench_u32_from_str, u32);
from_str_radix_bench!(bench_u32_from_str_radix_2, u32, 2);
from_str_radix_bench!(bench_u32_from_str_radix_10, u32, 10);
from_str_radix_bench!(bench_u32_from_str_radix_16, u32, 16);
from_str_radix_bench!(bench_u32_from_str_radix_36, u32, 36);
from_str_bench!(bench_u64_from_str, u64);
from_str_radix_bench!(bench_u64_from_str_radix_2, u64, 2);
from_str_radix_bench!(bench_u64_from_str_radix_10, u64, 10);
from_str_radix_bench!(bench_u64_from_str_radix_16, u64, 16);
from_str_radix_bench!(bench_u64_from_str_radix_36, u64, 36);
from_str_bench!(bench_i8_from_str, i8);
from_str_radix_bench!(bench_i8_from_str_radix_2, i8, 2);
from_str_radix_bench!(bench_i8_from_str_radix_10, i8, 10);
from_str_radix_bench!(bench_i8_from_str_radix_16, i8, 16);
from_str_radix_bench!(bench_i8_from_str_radix_36, i8, 36);
from_str_bench!(bench_i16_from_str, i16);
from_str_radix_bench!(bench_i16_from_str_radix_2, i16, 2);
from_str_radix_bench!(bench_i16_from_str_radix_10, i16, 10);
from_str_radix_bench!(bench_i16_from_str_radix_16, i16, 16);
from_str_radix_bench!(bench_i16_from_str_radix_36, i16, 36);
from_str_bench!(bench_i32_from_str, i32);
from_str_radix_bench!(bench_i32_from_str_radix_2, i32, 2);
from_str_radix_bench!(bench_i32_from_str_radix_10, i32, 10);
from_str_radix_bench!(bench_i32_from_str_radix_16, i32, 16);
from_str_radix_bench!(bench_i32_from_str_radix_36, i32, 36);
from_str_bench!(bench_i64_from_str, i64);
from_str_radix_bench!(bench_i64_from_str_radix_2, i64, 2);
from_str_radix_bench!(bench_i64_from_str_radix_10, i64, 10);
from_str_radix_bench!(bench_i64_from_str_radix_16, i64, 16);
from_str_radix_bench!(bench_i64_from_str_radix_36, i64, 36);