@elastic/eui/test-env/test/time_execution.js

Elastic UI Component Library

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.benchmarkFunction = benchmarkFunction;
exports.timeExecution = timeExecution;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

function timeExecution(fn) {
  var start = process.hrtime();
  fn();
  var _process$hrtime = process.hrtime(start),
    _process$hrtime2 = (0, _slicedToArray2.default)(_process$hrtime, 2),
    seconds = _process$hrtime2[0],
    nanoseconds = _process$hrtime2[1];
  var milliseconds = seconds * 1000 + nanoseconds / 1000000;
  return milliseconds;
}
function benchmarkFunction(fn) {
  var warmupRuns = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 3;
  var benchmarkRuns = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 3;
  // warmup v8 optimizations, cache, etc
  for (var i = 0; i < warmupRuns; i++) {
    fn();
  }
  var runTimes = [];
  for (var _i = 0; _i < benchmarkRuns; _i++) {
    runTimes.push(timeExecution(fn));
  }
  return Math.min.apply(null, runTimes);
}