src/third_party/web_platform_tests/tools/pywebsocket/src/example/arraybuffer_benchmark.html - cobalt - Git at Google

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 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 <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>
	<!--
	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>