What causes Chrome Timeline Frame to have so much empty white space

Question

Sometimes when I Inspect Element in Google Chrome I find that I have some large frames, but they are filled with white space. Anyone know what often causes such large amoun

Answer 1

This is documented here, see the 'About clear or light-gray frames' section. 'Clear frames' in question are described there as

Idle time between display refresh cycles.

According to this video, clear bar indicates browser waiting for a CPU or a GPU. There is nothing that developers can do to fix this when working on a 'standard' website.