mirror of
https://github.com/zhigang1992/react-native-web.git
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ed0cafac7c
Reorganizes and rewrites the benchmarks. Each implementation is now self-contained and the benchmarks can be run using a GUI. The benchmarks themselves have been changed so that individual tests render over a shorter time frame and more samples are taken.
28 lines
727 B
JavaScript
28 lines
727 B
JavaScript
// @flow
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type ValuesType = Array<number>;
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export const getStdDev = (values: ValuesType): number => {
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const avg = getMean(values);
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const squareDiffs = values.map((value: number) => {
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const diff = value - avg;
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return diff * diff;
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});
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return Math.sqrt(getMean(squareDiffs));
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};
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export const getMean = (values: ValuesType): number => {
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const sum = values.reduce((sum: number, value: number) => sum + value, 0);
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return sum / values.length;
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};
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export const getMedian = (values: ValuesType): number => {
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if (values.length === 1) {
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return values[0];
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}
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const numbers = values.sort((a: number, b: number) => a - b);
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return (numbers[(numbers.length - 1) >> 1] + numbers[numbers.length >> 1]) / 2;
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};
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