[GC/Leaks] updated FPS function to use static objects

- polyfill for typed arrays
- removed as much allocations as possible in the FPS function to make the GC faster
[Metrics] uncapped FPS

- uncapped FPS to report as high as it can
- turned up all stress tests by default
- has a bug where the document.body.scrollTop sometimes report a high number before any scroll event. This happens at random