third_party/WebKit/LayoutTests/fast/workers/worker-supplement-gc.html

   1 <!DOCTYPE HTML>
   2 <script src="../../resources/js-test.js"></script>
   3 <script src="resources/worker-create-common.js"></script>
   4 <script>
   5 description("Test GCing of WorkerGlobalScope supplementable");
   6 window.jsTestIsAsync = true;
   7 if (window.testRunner) {
   8     testRunner.dumpAsText();
   9     testRunner.waitUntilDone();
  10 }
  11 function gc()
  12 {
  13     if (window.GCController)
  14         return GCController.collect();
  15
  16     for (var i = 0; i < 10000; i++) { // > force garbage collection (FF requires about 9K allocations before a collect)
  17         var s = new String("abc");
  18     }
  19 }
  20
  21 // Test that garbage collection of 'supplements' that extend the
  22 // WorkerGlobalScope object is well behaved.
  23 var worker = createWorker();
  24 var count = 0;
  25
  26 function ping()
  27 {
  28     worker.postMessage("eval gc(); self.performance && self.performance.now()");
  29 }
  30 worker.onmessage = function (e) {
  31     if (count++ > 4)
  32         finishJSTest();
  33     else
  34         ping();
  35     gc();
  36 }
  37 ping();
  38 </script>