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what factors reduced start rend time?
04-28-2012, 01:00 PM
Post: #1
what factors reduced start rend time?
please see below test result:
http://www.webpagetest.org/result/120426...1/details/

start rent time:2.382s.

I think that JS may be influence start Render, is it right?
but I don't see which JS blocking start render time.

Do you tell me how to know which JS block? thank you!
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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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