Update web-platform-tests to revision e92532746b7615dcccdfa060937a87664816b1db

tests/wpt/web-platform-tests/tools/pywebsocket/example/util.js

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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.
+
+
+// Utilities for example applications (for both main and worker thread).
+
+var results = {};
+
+function getTimeStamp() {
+  return Date.now();
+}
+
+function formatResultInKiB(size, timePerMessageInMs, stddevTimePerMessageInMs,
+    speed, printSize) {
+  if (printSize) {
+    return (size / 1024) +
+        '\t' + timePerMessageInMs.toFixed(3) +
+        (stddevTimePerMessageInMs == -1 ?
+            '' :
+            '\t' + stddevTimePerMessageInMs.toFixed(3)) +
+        '\t' + speed.toFixed(3);
+  } else {
+    return speed.toString();
+  }
+}
+
+function clearAverageData() {
+  results = {};
+}
+
+function reportAverageData(config) {
+  config.addToSummary(
+      'Size[KiB]\tAverage time[ms]\tStddev time[ms]\tSpeed[KB/s]');
+  for (var size in results) {
+    var averageTimePerMessageInMs = results[size].sum_t / results[size].n;
+    var speed = calculateSpeedInKB(size, averageTimePerMessageInMs);
+    // Calculate sample standard deviation
+    var stddevTimePerMessageInMs = Math.sqrt(
+        (results[size].sum_t2 / results[size].n -
+            averageTimePerMessageInMs * averageTimePerMessageInMs) *
+        results[size].n /
+        (results[size].n - 1));
+    config.addToSummary(formatResultInKiB(
+        size, averageTimePerMessageInMs, stddevTimePerMessageInMs, speed,
+        true));
+  }
+}
+
+function calculateSpeedInKB(size, timeSpentInMs) {
+  return Math.round(size / timeSpentInMs * 1000) / 1000;
+}
+
+function calculateAndLogResult(config, size, startTimeInMs, totalSize,
+    isWarmUp) {
+  var timeSpentInMs = getTimeStamp() - startTimeInMs;
+  var speed = calculateSpeedInKB(totalSize, timeSpentInMs);
+  var timePerMessageInMs = timeSpentInMs / (totalSize / size);
+  if (!isWarmUp) {
+    config.measureValue(timePerMessageInMs);
+    if (!results[size]) {
+      results[size] = {n: 0, sum_t: 0, sum_t2: 0};
+    }
+    results[size].n ++;
+    results[size].sum_t += timePerMessageInMs;
+    results[size].sum_t2 += timePerMessageInMs * timePerMessageInMs;
+  }
+  config.addToLog(formatResultInKiB(size, timePerMessageInMs, -1, speed,
+      config.printSize));
+}
+
+function repeatString(str, count) {
+  var data = '';
+  var expChunk = str;
+  var remain = count;
+  while (true) {
+    if (remain % 2) {
+      data += expChunk;
+      remain = (remain - 1) / 2;
+    } else {
+      remain /= 2;
+    }
+
+    if (remain == 0)
+      break;
+
+    expChunk = expChunk + expChunk;
+  }
+  return data;
+}
+
+function fillArrayBuffer(buffer, c) {
+  var i;
+
+  var u32Content = c * 0x01010101;
+
+  var u32Blocks = Math.floor(buffer.byteLength / 4);
+  var u32View = new Uint32Array(buffer, 0, u32Blocks);
+  // length attribute is slow on Chrome. Don't use it for loop condition.
+  for (i = 0; i < u32Blocks; ++i) {
+    u32View[i] = u32Content;
+  }
+
+  // Fraction
+  var u8Blocks = buffer.byteLength - u32Blocks * 4;
+  var u8View = new Uint8Array(buffer, u32Blocks * 4, u8Blocks);
+  for (i = 0; i < u8Blocks; ++i) {
+    u8View[i] = c;
+  }
+}
+
+function verifyArrayBuffer(buffer, expectedChar) {
+  var i;
+
+  var expectedU32Value = expectedChar * 0x01010101;
+
+  var u32Blocks = Math.floor(buffer.byteLength / 4);
+  var u32View = new Uint32Array(buffer, 0, u32Blocks);
+  for (i = 0; i < u32Blocks; ++i) {
+    if (u32View[i] != expectedU32Value) {
+      return false;
+    }
+  }
+
+  var u8Blocks = buffer.byteLength - u32Blocks * 4;
+  var u8View = new Uint8Array(buffer, u32Blocks * 4, u8Blocks);
+  for (i = 0; i < u8Blocks; ++i) {
+    if (u8View[i] != expectedChar) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+function verifyBlob(config, blob, expectedChar, doneCallback) {
+  var reader = new FileReader(blob);
+  reader.onerror = function() {
+    config.addToLog('FileReader Error: ' + reader.error.message);
+    doneCallback(blob.size, false);
+  }
+  reader.onloadend = function() {
+    var result = verifyArrayBuffer(reader.result, expectedChar);
+    doneCallback(blob.size, result);
+  }
+  reader.readAsArrayBuffer(blob);
+}
+
+function verifyAcknowledgement(config, message, size) {
+  if (typeof message != 'string') {
+    config.addToLog('Invalid ack type: ' + typeof message);
+    return false;
+  }
+  var parsedAck = parseInt(message);
+  if (isNaN(parsedAck)) {
+    config.addToLog('Invalid ack value: ' + message);
+    return false;
+  }
+  if (parsedAck != size) {
+    config.addToLog(
+        'Expected ack for ' + size + 'B but received one for ' + parsedAck +
+        'B');
+    return false;
+  }
+
+  return true;
+}
+
+function cloneConfig(obj) {
+  var newObj = {};
+  for (key in obj) {
+    newObj[key] = obj[key];
+  }
+  return newObj;
+}
+
+var tasks = [];
+
+function runNextTask(config) {
+  var task = tasks.shift();
+  if (task == undefined) {
+    config.addToLog('Finished');
+    cleanup();
+    return;
+  }
+  timerID = setTimeout(task, 0);
+}
+
+function buildLegendString(config) {
+  var legend = ''
+  if (config.printSize)
+    legend = 'Message size in KiB, Time/message in ms, ';
+  legend += 'Speed in kB/s';
+  return legend;
+}
+
+function addTasks(config, stepFunc) {
+  for (var i = 0;
+      i < config.numWarmUpIterations + config.numIterations; ++i) {
+    var multiplierIndex = 0;
+    for (var size = config.startSize;
+         size <= config.stopThreshold;
+         ++multiplierIndex) {
+      var task = stepFunc.bind(
+          null,
+          size,
+          config,
+          i < config.numWarmUpIterations);
+      tasks.push(task);
+      var multiplier = config.multipliers[
+        multiplierIndex % config.multipliers.length];
+      if (multiplier <= 1) {
+        config.addToLog('Invalid multiplier ' + multiplier);
+        config.notifyAbort();
+        throw new Error('Invalid multipler');
+      }
+      size = Math.ceil(size * multiplier);
+    }
+  }
+}
+
+function addResultReportingTask(config, title) {
+  tasks.push(function(){
+      timerID = null;
+      config.addToSummary(title);
+      reportAverageData(config);
+      clearAverageData();
+      runNextTask(config);
+  });
+}
+
+function sendBenchmark(config) {
+  config.addToLog('Send benchmark');
+  config.addToLog(buildLegendString(config));
+
+  tasks = [];
+  clearAverageData();
+  addTasks(config, sendBenchmarkStep);
+  addResultReportingTask(config, 'Send Benchmark ' + getConfigString(config));
+  startBenchmark(config);
+}
+
+function receiveBenchmark(config) {
+  config.addToLog('Receive benchmark');
+  config.addToLog(buildLegendString(config));
+
+  tasks = [];
+  clearAverageData();
+  addTasks(config, receiveBenchmarkStep);
+  addResultReportingTask(config,
+      'Receive Benchmark ' + getConfigString(config));
+  startBenchmark(config);
+}
+
+function stop(config) {
+  clearTimeout(timerID);
+  timerID = null;
+  tasks = [];
+  config.addToLog('Stopped');
+  cleanup();
+}
+
+var worker;
+
+function initWorker(connectionType, origin) {
+  var scriptPath =
+    connectionType === 'WebSocket' ? '/benchmark.js' :
+    connectionType === 'XHR' ? '/xhr_benchmark.js' :
+    '/fetch_benchmark.js'; // connectionType === 'fetch'
+  worker = new Worker(origin + scriptPath);
+}
+
+function doAction(config, isWindowToWorker, action) {
+  if (isWindowToWorker) {
+    worker.onmessage = function(addToLog, addToSummary,
+                                measureValue, notifyAbort, message) {
+      if (message.data.type === 'addToLog')
+        addToLog(message.data.data);
+      else if (message.data.type === 'addToSummary')
+        addToSummary(message.data.data);
+      else if (message.data.type === 'measureValue')
+        measureValue(message.data.data);
+      else if (message.data.type === 'notifyAbort')
+        notifyAbort();
+    }.bind(undefined, config.addToLog, config.addToSummary,
+           config.measureValue, config.notifyAbort);
+    config.addToLog = undefined;
+    config.addToSummary = undefined;
+    config.measureValue = undefined;
+    config.notifyAbort = undefined;
+    worker.postMessage({type: action, config: config});
+  } else {
+    if (action === 'sendBenchmark')
+      sendBenchmark(config);
+    else if (action === 'receiveBenchmark')
+      receiveBenchmark(config);
+    else if (action === 'batchBenchmark')
+      batchBenchmark(config);
+    else if (action === 'stop')
+      stop(config);
+  }
+}