native_client_sdk/src/examples/api/core/example.js

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 var itrMax = 1000;
   6 var itrCount = 0;
   7 var itrSend = new Float64Array(itrMax);
   8 var itrNaCl = new Float64Array(itrMax);
   9 var itrRecv = new Float64Array(itrMax);
  10 var delay = 0;
  11
  12 function getTimeInMilliseconds() {
  13   return (new Date()).getTime();
  14 }
  15
  16 function attachListeners() {
  17   document.getElementById('start').addEventListener('click', startTest);
  18   countEl = document.getElementById('count');
  19   countEl.textContent = itrMax;
  20 }
  21
  22 function startTest() {
  23   if (common.naclModule) {
  24     var startEl = document.getElementById('start');
  25     startEl.disabled = true;
  26
  27     var delayEl = document.getElementById('delay');
  28     delay = parseInt(delayEl.value, 10);
  29
  30     common.updateStatus('Running Test');
  31     itrCount = 0;
  32     itrSend[0] = getTimeInMilliseconds();
  33     common.naclModule.postMessage(delay);
  34   }
  35 }
  36
  37 function setStats(nacl, compute, total) {
  38   var statNaClEl = document.getElementById('NaCl');
  39   var statRoundEl = document.getElementById('Round');
  40   var statTotalEl = document.getElementById('Total');
  41
  42   statNaClEl.textContent = (nacl / itrMax) + ' ms';
  43   statRoundEl.textContent = (compute / itrMax) + ' ms';
  44   statTotalEl.textContent = (total / itrMax) + ' ms';
  45 }
  46
  47 // Called by the common.js module.
  48 function handleMessage(message_event) {
  49   // Convert NaCl Seconds elapsed to MS
  50   itrNaCl[itrCount] = message_event.data * 1000.0;
  51   itrRecv[itrCount] = getTimeInMilliseconds();
  52   itrCount++;
  53
  54   if (itrCount === itrMax) {
  55     common.updateStatus('Test Finished');
  56     var startEl = document.getElementById('start');
  57     startEl.disabled = false;
  58
  59     var naclMS = 0.0;
  60     var computeMS = 0.0;
  61     for (var i = 0; i < itrMax; i++) {
  62       naclMS += itrNaCl[i];
  63       computeMS += itrRecv[i] - itrSend[i];
  64     }
  65
  66     setStats(naclMS, computeMS, itrRecv[itrMax - 1] - itrSend[0]);
  67   } else {
  68     itrSend[itrCount] = getTimeInMilliseconds();
  69     common.naclModule.postMessage(delay);
  70   }
  71 }