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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> |