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      1 // Copyright (c) 2012 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 totalTime;
      6 var fudgeTime;
      7 var elapsedTime;
      8 var endTime;
      9 var iterations;
     10 var cycle;
     11 var results = false;
     12 var TIMEOUT = 15;
     13 
     14 /**
     15  * Returns the value of the given property stored in the cookie.
     16  * @param {string} name The property name.
     17  * @return {string} The value of the given property, or empty string
     18  *     if the property was not found.
     19  */
     20 function __get_cookie(name) {
     21   var cookies = document.cookie.split('; ');
     22   for (var i = 0; i < cookies.length; ++i) {
     23     var t = cookies[i].split('=');
     24     if ((t[0] == name) && t[1])
     25       return t[1];
     26   }
     27   return '';
     28 }
     29 
     30 function __get_timings() {
     31   if (sessionStorage == null)
     32     return __get_cookie("__pc_timings");
     33   else {
     34     if (sessionStorage.getItem("__pc_timings") == null)
     35       return "";
     36     else
     37       return sessionStorage["__pc_timings"];
     38   }
     39 }
     40 function __set_timings(timings) {
     41   if (sessionStorage == null)
     42     document.cookie = "__pc_timings=" + timings + "; path=/";
     43   else
     44     sessionStorage["__pc_timings"]=timings;
     45 }
     46 
     47 /**
     48  * Starts the next test cycle or redirects the browser to the results page.
     49  */
     50 function nextCycleOrResults() {
     51   // Call GC twice to cleanup JS heap before starting a new test.
     52   if (window.gc) {
     53     window.gc();
     54     window.gc();
     55   }
     56 
     57   var timings = elapsedTime;
     58   var oldTimings = __get_timings();
     59   if (oldTimings != '')
     60     timings = oldTimings + ',' + timings;
     61   __set_timings(timings);
     62 
     63   var tLag = Date.now() - endTime - TIMEOUT;
     64   if (tLag > 0)
     65     fudgeTime += tLag;
     66 
     67   var doc;
     68   if (cycle == iterations) {
     69     document.cookie = '__pc_done=1; path=/';
     70     doc = '../../common/report.html';
     71     if (window.console) {
     72       console.log("Pages: [" + __get_cookie('__pc_pages') + "]");
     73       console.log("times: [" + __get_timings() + "]");
     74     }
     75   } else {
     76     doc = 'index.html';
     77   }
     78 
     79   var url = doc + '?n=' + iterations + '&i=' + cycle +
     80       '&td=' + totalTime + '&tf=' + fudgeTime;
     81   document.location.href = url;
     82 }
     83 
     84 /**
     85  * Computes various running times and updates the stats reported at the end.
     86  * @param {!number} cycleTime The running time of the test cycle.
     87  */
     88 function testComplete(cycleTime) {
     89   if (results)
     90     return;
     91 
     92   var oldTotalTime = 0;
     93   var cycleEndTime = Date.now();
     94   var cycleFudgeTime = 0;
     95 
     96   var s = document.location.search;
     97   if (s) {
     98     var params = s.substring(1).split('&');
     99     for (var i = 0; i < params.length; i++) {
    100       var f = params[i].split('=');
    101       switch (f[0]) {
    102         case 'skip':
    103           return;  // No calculation, just viewing
    104         case 'n':
    105           iterations = f[1];
    106           break;
    107         case 'i':
    108           cycle = f[1] - 0 + 1;
    109           break;
    110         case 'td':
    111           oldTotalTime = f[1] - 0;
    112           break;
    113         case 'tf':
    114           cycleFudgeTime = f[1] - 0;
    115           break;
    116       }
    117     }
    118   }
    119   elapsedTime = cycleTime;
    120   totalTime = oldTotalTime + elapsedTime;
    121   endTime = cycleEndTime;
    122   fudgeTime = cycleFudgeTime;
    123 
    124   setTimeout(nextCycleOrResults, TIMEOUT);
    125 }
    126