NEW 102936
Lookahead parser should evaluate Link header for rel=prefetch/stylesheet/script 
https://bugs.webkit.org/show_bug.cgi?id=102936
Summary Lookahead parser should evaluate Link header for rel=prefetch/stylesheet/script
Nicholas Shanks
Reported 2012-11-21 06:38:11 PST
Modern best practice is to put the scripts a page uses at the bottom of the document, as long as they do not use APIs like document.write() Doing so requires that the look-ahead parser scan through an entire document before finding them. As an experiment, my web app now emits this: HTTP/1.1 200 OK Link:</style/common.min.css>;rel=stylesheet prefetch, </scripts/common.min.js>;rel=script prefetch ...response body... however no difference above the statistical variance was noticed in the timing of speculative resource requests. Anecdotal: See http://stackoverflow.com/questions/3641581/link-rel-script-usage for comments about rel=script
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