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** [tickets:#7027] Cache /nf/tool_icon_css better**
**Status:** closed
**Milestone:** asf_release_1.2.0
**Labels:** performance bitesize sf-1
**Created:** Mon Jan 06, 2014 08:57 PM UTC by Dave Brondsema
**Last Updated:** Sat Jan 03, 2015 10:07 AM UTC
**Owner:** Tim Van Steenburgh
/nf/tool_icon_css is a dynamically created CSS file. It is currently cached
via etag headers, but that means a request still goes to the server and it has
to respond with a 304. So this is a lot of extra requests (on sf.net, ~35% of
/nf/tool_icon_css requests are 304s)
We should set a future expires header, and then do cache-busting with a unique
URL by appending `?{{config.build_key}}` (build_key is already used for this
purpose for all our other static resources)
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