Mercurial > jdk8-mips64-public > nashorn / annotate
test/lib/benchmark.js@6d5471a497fb (annotated)
test/lib/benchmark.js
Thu, 31 Aug 2017 15:30:47 +0800
- author
- aoqi
- date
- Thu, 31 Aug 2017 15:30:47 +0800
- changeset 952
- 6d5471a497fb
- parent 7
- 5a1b0714df0e
- parent 0
- b1a7da25b547
- child 1205
- 4112748288bb
- permissions
- -rw-r--r--
merge
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | */ |
| aoqi@0 | 23 | |
| aoqi@0 | 24 | /** |
| aoqi@0 | 25 | * A simple benchmark module that can be loaded |
| aoqi@0 | 26 | * in order to time how many times a method executes |
| aoqi@0 | 27 | * in a fixed number of seconds |
| aoqi@0 | 28 | */ |
| aoqi@0 | 29 | |
| aoqi@0 | 30 | var benchmark = function(method, timeInMillis, args) { |
| aoqi@0 | 31 | var hz, |
| aoqi@0 | 32 | period, |
| aoqi@0 | 33 | startTime = new Date, |
| aoqi@0 | 34 | runs = 0; |
| aoqi@0 | 35 | do { |
| aoqi@0 | 36 | method.apply(args); |
| aoqi@0 | 37 | runs++; |
| aoqi@0 | 38 | totalTime = new Date - startTime; |
| aoqi@0 | 39 | } while (totalTime < timeInMillis); |
| aoqi@0 | 40 | |
| aoqi@0 | 41 | // convert ms to seconds |
| aoqi@0 | 42 | totalTime /= 1000; |
| aoqi@0 | 43 | |
| aoqi@0 | 44 | // period → how long per operation |
| aoqi@0 | 45 | period = totalTime / runs; |
| aoqi@0 | 46 | |
| aoqi@0 | 47 | // hz → the number of operations per second |
| aoqi@0 | 48 | hz = 1 / period; |
| aoqi@0 | 49 | |
| aoqi@0 | 50 | return hz; |
| aoqi@0 | 51 | }; |
| aoqi@0 | 52 |
