You can use 'timeline' in Chrome DevTools tools to record a page load and meaure & analyze stuff like paint, FPS and CPU. Compare between the new and the old slider.
gentlemedia 803 Master Poster
gentlemedia 803 Master Poster
gentlemedia 803 Master Poster
gentlemedia 803 Master Poster
rproffitt commented: +1. CanIUse is great stuff. +10