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A comment on WebP – A new image format for the Web. Parent comment

Re:WebP – A new image format for the Web by scaz on Sunday March 23, 2014 @07:44AM (#7452987)
You cache negotiated responses[1] using the Vary header[2]. PageSpeed does rewrite URLs in the HTML, it just isn't needed in this case.

[1] http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13...

[2] http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14...

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