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-<!--
-Copyright 2013, Google Inc.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
- * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
- * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--->
-
-<html>
-<head>
-<title>ArrayBuffer benchmark</title>
-<script src="util.js"></script>
-<script>
-var PRINT_SIZE = true;
-
-// Initial size of arrays.
-var START_SIZE = 10 * 1024;
-// Stops benchmark when the size of an array exceeds this threshold.
-var STOP_THRESHOLD = 100000 * 1024;
-// If the size of each array is small, write/read the array multiple times
-// until the sum of sizes reaches this threshold.
-var MIN_TOTAL = 100000 * 1024;
-var MULTIPLIERS = [5, 2];
-
-// Repeat benchmark for several times to measure performance of optimized
-// (such as JIT) run.
-var REPEAT_FOR_WARMUP = 3;
-
-function writeBenchmark(size, minTotal) {
- var totalSize = 0;
- while (totalSize < minTotal) {
- var arrayBuffer = new ArrayBuffer(size);
-
- // Write 'a's.
- fillArrayBuffer(arrayBuffer, 0x61);
-
- totalSize += size;
- }
- return totalSize;
-}
-
-function readBenchmark(size, minTotal) {
- var totalSize = 0;
- while (totalSize < minTotal) {
- var arrayBuffer = new ArrayBuffer(size);
-
- if (!verifyArrayBuffer(arrayBuffer, 0x00)) {
- queueLog('Verification failed');
- return -1;
- }
-
- totalSize += size;
- }
- return totalSize;
-}
-
-function runBenchmark(benchmarkFunction,
- size,
- stopThreshold,
- minTotal,
- multipliers,
- multiplierIndex) {
- while (size <= stopThreshold) {
- var maxSpeed = 0;
-
- for (var i = 0; i < REPEAT_FOR_WARMUP; ++i) {
- var startTimeInMs = getTimeStamp();
-
- var totalSize = benchmarkFunction(size, minTotal);
-
- maxSpeed = Math.max(maxSpeed,
- calculateSpeedInKB(totalSize, startTimeInMs));
- }
- queueLog(formatResultInKiB(size, maxSpeed, PRINT_SIZE));
-
- size *= multipliers[multiplierIndex];
- multiplierIndex = (multiplierIndex + 1) % multipliers.length;
- }
-}
-
-function runBenchmarks() {
- queueLog('Message size in KiB, Speed in kB/s');
-
- queueLog('Write benchmark');
- runBenchmark(
- writeBenchmark, START_SIZE, STOP_THRESHOLD, MIN_TOTAL, MULTIPLIERS, 0);
- queueLog('Finished');
-
- queueLog('Read benchmark');
- runBenchmark(
- readBenchmark, START_SIZE, STOP_THRESHOLD, MIN_TOTAL, MULTIPLIERS, 0);
- addToLog('Finished');
-}
-
-function init() {
- logBox = document.getElementById('log');
-
- queueLog(window.navigator.userAgent.toLowerCase());
-
- addToLog('Started...');
-
- setTimeout(runBenchmarks, 0);
-}
-
-</script>
-</head>
-<body onload="init()">
-<textarea
- id="log" rows="50" style="width: 100%" readonly></textarea>
-</body>
-</html>