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Added standard performance metrics

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murgatroid99 2015-02-11 12:28:34 -08:00
parent 6fea4ccb0a
commit 4f0bd5a63f
1 changed files with 16 additions and 5 deletions
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21
examples/perf_test.js
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@ -83,6 +83,16 @@ function runTest(iterations, callback) {
warmUp(100);
}
function percentile(arr, percentile) {
if (percentile > 99) {
percentile = 99;
}
if (percentile < 0) {
percentile = 0;
}
return arr[(arr.length * percentile / 100)|0];
}
if (require.main === module) {
var count;
if (process.argv.length >= 3) {
@ -91,13 +101,14 @@ if (require.main === module) {
count = 100;
}
runTest(count, function(results) {
var sorted_intervals = _.sortBy(results.intervals, _.identity);
console.log('count:', count);
console.log('total time:', results.total, 'us');
console.log('min latency:', _.min(results.intervals), 'us');
console.log('max latency:', _.max(results.intervals), 'us');
console.log('average latency:', _.reduce(results.intervals, function(a, b){
return a+b;
}) / count, 'us');
console.log('median:', percentile(sorted_intervals, 50), 'us');
console.log('90th percentile:', percentile(sorted_intervals, 90), 'us');
console.log('95th percentile:', percentile(sorted_intervals, 95), 'us');
console.log('99th percentile:', percentile(sorted_intervals, 99), 'us');
console.log('QPS:', (count / results.total) * 1000000);
});
}