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To ETag or not to ETag
04-06-2009, 02:21 AM
Post: #2
RE: To ETag or not to ETag
We have the recommendations in order of importance (left to right in the checklist, top to bottom in the report). At least based on sites we're familiar with and ETags is the lowest. It's really only there because it's fairly easy to mess up and there are specific use cases where they are needed (dynamic content where you hash the response for example). Outside of the specific use cases where they add value there's really no benefit beyond what you get from last-modified.

As with just about all of the other recommendations, there are usually specific use cases where it makes sense to not follow the recommendations. Take http://www.google.com for example. We usually frown pretty strongly on serving static content from a domain that has cookies on it but since there are only 2 requests to display the page (plus some pre-caching onLoad) the savings from not having to do another DNS lookup and socket connect more than make up for it.
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Messages In This Thread
To ETag or not to ETag - pmeenan - 04-06-2009, 02:20 AM
RE: To ETag or not to ETag - pmeenan - 04-06-2009 02:21 AM
RE: To ETag or not to ETag - rchurchill - 10-06-2009, 10:59 AM
RE: To ETag or not to ETag - pmeenan - 10-06-2009, 11:25 PM
RE: To ETag or not to ETag - Naresh - 12-22-2009, 05:01 AM
RE: To ETag or not to ETag - pmeenan - 12-22-2009, 07:30 AM

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