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WebPagetest Forums - What can cause this gup?

WebPagetest Forums

Full Version: What can cause this gup?
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What causes this empty space? between html and css? (in the picture, the red arrow)

[Image: mfrPMc]
Most likely the browser is busy doing something else - could be loading js, parsing huge style sheets, etc. In some cases with some test environments the browser is actually updating itself or plugins.

Take a look at the CPU Utilization graph that appears underneath your waterfall - is that high?
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