Tue, 22 Mar 2016 10:30:12 -0700
Added tag jdk8u91-b13 for changeset 22925b345dff
1 /*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
24 /**
25 * A simple benchmark module that can be loaded
26 * in order to time how many times a method executes
27 * in a fixed number of seconds
28 */
30 var benchmark = function(method, timeInMillis, args) {
31 var hz,
32 period,
33 startTime = new Date,
34 runs = 0;
35 do {
36 method.apply(args);
37 runs++;
38 totalTime = new Date - startTime;
39 } while (totalTime < timeInMillis);
41 // convert ms to seconds
42 totalTime /= 1000;
44 // period → how long per operation
45 period = totalTime / runs;
47 // hz → the number of operations per second
48 hz = 1 / period;
50 return hz;
51 };