1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.compatibility.common.util; 18 19 /** 20 * Provides a mechanism to measure the time taken to run a piece of code. 21 * 22 * The code will be run multiple times and the time taken by each run will returned. 23 */ 24 public class MeasureTime { 25 /** 26 * measure time taken for each run for given count 27 * @param count 28 * @param run 29 * @return array of time taken in each run in msec. 30 * @throws Exception 31 */ measure(int count, MeasureRun run)32 public static double[] measure(int count, MeasureRun run) throws Exception { 33 double[] result = new double[count]; 34 35 for (int i = 0; i < count; i++) { 36 run.prepare(i); 37 long start = System.currentTimeMillis(); 38 run.run(i); 39 long end = System.currentTimeMillis(); 40 result[i] = end - start; 41 } 42 return result; 43 } 44 } 45