[luke3butler]

There are a lot of jsperf tests like this one https://jsperf.com/translate3d-vs-xy/4

This isn't pure css as it's using JS to set the property, but it should be a good indicator.

[ash_gti]

I'm not an expert in this area, but doesn't setting these properties only take effect in the next layout/paint cycle?

I think you need to call getComputedStyle (https://developer.mozilla.org/en-US/docs/Web/API/Window/getC...) to resolve the new style update outside of the layout/paint cycle.

But I'm not really sure to be honest