Comment on How fast is apple.com?parentComments−mjs13yThe mod_pagespeed service does some of these optimisations (plus others). It's almost certainly applying JS concatenation, and in the end there's not much difference in load time:http://www.webpagetest.org/result/121024_K0_78b60a17cae988da...EDIT: Actually, it is applying some concatenation, but it's not concatenating everything: http://www.webpagetest.org/result/121024_35_049258ec5056f5b4...
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The mod_pagespeed service does some of these optimisations (plus others). It's almost certainly applying JS concatenation, and in the end there's not much difference in load time:
http://www.webpagetest.org/result/121024_K0_78b60a17cae988da...
EDIT: Actually, it is applying some concatenation, but it's not concatenating everything: http://www.webpagetest.org/result/121024_35_049258ec5056f5b4...