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extra::test: handle slow benchmarks more gracefully. #10952

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Dec 15, 2013
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extra::test: handle slow benchmarks more gracefully. #10952

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11 changes: 10 additions & 1 deletion src/libextra/test.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1110,6 +1110,15 @@ impl BenchHarness {
} else {
n = 1_000_000 / self.ns_per_iter().max(&1);
}
// if the first run took more than 1ms we don't want to just
// be left doing 0 iterations on every loop. The unfortunate
// side effect of not being able to do as many runs is
// automatically handled by the statistical analysis below
// (i.e. larger error bars).
if n == 0 { n = 1; }

debug!("Initial run took {} ns, iter count that takes 1ms estimated as {}",
self.ns_per_iter(), n);

let mut total_run = 0;
let samples : &mut [f64] = [0.0_f64, ..50];
Expand Down Expand Up @@ -1141,7 +1150,7 @@ impl BenchHarness {
let now = precise_time_ns();
let loop_run = now - loop_start;

// If we've run for 100ms an seem to have converged to a
// If we've run for 100ms and seem to have converged to a
// stable median.
if loop_run > 100_000_000 &&
summ.median_abs_dev_pct < 1.0 &&
Expand Down