90c471e73f
- use high-precision wall timer only - warm caches once before measuring - measure independent samples, calculating statistics - add --verbose to control how much data we output Also removed some unloved features from bench_record. BUG=skia: R=jcgregorio@google.com, mtklein@google.com Author: mtklein@chromium.org Review URL: https://codereview.chromium.org/338203002
33 lines
780 B
C
33 lines
780 B
C
#ifndef Stats_DEFINED
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#define Stats_DEFINED
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struct Stats {
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Stats(const double samples[], int n) {
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min = samples[0];
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max = samples[0];
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for (int i = 0; i < n; i++) {
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if (samples[i] < min) { min = samples[i]; }
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if (samples[i] > max) { max = samples[i]; }
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}
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double sum = 0.0;
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for (int i = 0 ; i < n; i++) {
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sum += samples[i];
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}
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mean = sum / n;
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double err = 0.0;
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for (int i = 0 ; i < n; i++) {
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err += (samples[i] - mean) * (samples[i] - mean);
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}
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var = err / (n-1);
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}
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double min;
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double max;
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double mean; // Estimate of population mean.
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double var; // Estimate of population variance.
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};
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#endif//Stats_DEFINED
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