test_memory_gc_01.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<!--

Bug 1067491 - Test forcing a gc.

-->

<head>

  <meta charset="utf-8">

  <title>Memory monitoring actor test</title>

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">

</head>

<body>

<pre id="test">

<script src="memory-helpers.js" type="application/javascript"></script>

<script>

"use strict";

window.onload = function() {

  SimpleTest.waitForExplicitFinish();

  (async function() {

    const { memory, target } = await startServerAndGetSelectedTabMemory();

    let beforeGC, afterGC;

    do {

      let objects = [];

      for (let i = 0; i < 1000; i++) {

        const o = {};

        o[Math.random()] = 1;

        objects.push(o);

      objects = null;

      beforeGC = (await memory.measure()).total;

      await memory.forceGarbageCollection();

      afterGC = (await memory.measure()).total;

    } while (beforeGC < afterGC);

    ok(true, "The amount of memory after GC should eventually decrease");

    destroyServerAndFinish(target);

  })();

};

</script>

</pre>

</body>

</html>