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what factors reduced start rend time?
05-01-2012, 08:49 AM
Post: #2
RE: what factors reduced start rend time?
Any JS at the top of the document will block start render (in the head or the beginning of the HTML). Additionally, JS that does a document.write before the browser renders will usually also block it.

You can do some a/b testing by using the blocking capabilities (advanced settings->block) and block the different js resources until you narrow it down (maybe start by blocking all js by using ".js").

Here's what it looks like when all js is blocked: http://www.webpagetest.org/result/120430...4b6cc2e8a/
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RE: what factors reduced start rend time? - pmeenan - 05-01-2012 08:49 AM

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