WebPagetest Forums
Document complete before start render. - Printable Version

+- WebPagetest Forums (https://www.webpagetest.org/forums)
+-- Forum: Web Performance (/forumdisplay.php?fid=3)
+--- Forum: Discuss Test Results (/forumdisplay.php?fid=4)
+--- Thread: Document complete before start render. (/showthread.php?tid=510)



Document complete before start render. - JoegoTaak - 01-26-2011 11:55 PM

Please look at these test results:

http://www.webpagetest.org/result/110124_C2_1D85/1/details/

Start Render time is: 0.465s
Document complete time is: 0.396s

How can a document being complete before rendering is started?


RE: Document complete before start render. - pmeenan - 01-27-2011 12:09 AM

The browser UI is painted on the main thread and almost in an idle loop. For a really fast page it's not uncommon for the onLoad to fire when the browser has finished processing the DOM and doing the layout internally but before the screen actually gets painted.