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Rollup merge of #30959 - bluss:bench-resolution, r=Gankro

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test: Increase resolution of MB/s stat for bench runs close to 1 second

MB/s was based on the number of iterations performed in a second, when
the iteration duration nears 1 second (1e9 ns), the resolution of the
MB/s stat decreases.
This commit is contained in:
Manish Goregaokar 2016-01-17 17:25:48 +05:30
parent 3ba057b0b1 627829bde8
commit 00a4eeadaf
1 changed files with 1 additions and 2 deletions
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3
src/libtest/lib.rs
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@ -1275,8 +1275,7 @@ pub fn benchmark<F>(f: F) -> BenchSamples where F: FnMut(&mut Bencher) {
let ns_iter_summ = bs.auto_bench(f);
let ns_iter = cmp::max(ns_iter_summ.median as u64, 1);
let iter_s = 1_000_000_000 / ns_iter;
let mb_s = (bs.bytes * iter_s) / 1_000_000;
let mb_s = bs.bytes * 1000 / ns_iter;
BenchSamples {
ns_iter_summ: ns_iter_summ,