Expose performance.memory in workers

LayoutTests/http/tests/w3c/webperf/resources/worker.js

 function runTests(event) {
   var tests = event.data;
   var results = [];
   for (var i = 0; i < tests.length; i++) {
     try {
       results.push(eval(tests[i]));
     } catch(e) {
       results.push(e);
     }
   }
   return results;
 }
 
 self.onmessage = function(event) {
   var results = runTests(event);
-  postMessage(results);
+  postMessage(JSON.stringify(results));

[sof, 2014/03/20 20:19:12]

why do we need to indirect via JSON and not rely on structured cloning?

[Pan, 2014/03/24 07:31:18]

seems structured cloning does not work on performance.memory object. so manually
serialize it here.

[sof, 2014/03/24 07:38:39]

It's a bit stronger than that, every result in the webperf/ testsuite is
converted to JSON. Can't you selectively serialize performance.memory instead?

[Pan, 2014/03/24 07:45:43]

thanks,
you can see we don't distinguish performance.memory and other objects in this
code.
Other related test suit in webperf/ folder is for performance.now().
is there any concern we use JSON here :)

Pan

   self.close();
 };
 
 self.addEventListener("connect", function(event) {
   var port = event.ports[0];
   port.onmessage = function(event) {
     var results = runTests(event);
-    port.postMessage(results);
+    port.postMessage(JSON.stringify(results));
   };
 });