<!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <!doctype html> <html> <head> <meta charset="utf-8"/> <title>Performance tool + cycle collection test page</title> </head> <body> <script type="text/javascript"> window.test = function () { document.body.expando1 = { cycle: document.body }; SpecialPowers.Cu.forceCC(); document.body.expando2 = { cycle: document.body }; SpecialPowers.Cu.forceCC(); document.body.expando3 = { cycle: document.body }; SpecialPowers.Cu.forceCC(); setTimeout(window.test, 100); }; test(); </script> </body> </html>