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Re:Visualizing Layers in Web Inspector by ThurmaUman on Friday April 27, 2018 @07:23PM (#16945213)
> so optimizing using this tool

This is a debugging tool. I'm not sure how you optimize for a visualization of how your layout rendered.

Re:Visualizing Layers in Web Inspector by contoraria on Saturday April 28, 2018 @04:16AM (#16946656)
if certain layers were rendered before the rest, knowing which is which could help optimization.