The reason why transform & opacity (via CSS animations) are always recommended is because they can be done completely on the compositor thread without going bac

The reason why transform & opacity (via CSS animations) are always recommended is because they can be done completely on the compositor thread without going back to the main thread. If you need to run every frame of animation from JS then, yes, you're screwed. At least until https://groups.google.com/a/chromium.org/d/topic/blink-dev/YlG2OvHgVaQ/discussion https://groups.google.com/a/chromium.org/d/topic/blink-dev/Y... & https://github.com/flackr/compositor-worker https://github.com/flackr/compositor-worker)