Cache-Control: immutable
About one year ago our friends at Facebook brought an interesting issue to the IETF HTTP Working Group - a lot (20%!) of their transactions for long lived resources (e.g. css, js) were resulting in 304 Not Modified. These are documents that have long explicit cache lifetimes of a year or more and are being revalidated well before they had even existed for that long. The problem remains unchanged.
DNS Prefetching for Firefox
Real data and musings on the performance of networks, servers, protocols, and their related folks. Recently I implemented patches to implement DNS prefetching in Firefox. I am primarily interested in their impact on Fennec (aka Mobile Firefox), but it looks like they will land first in Firefox 3.1 beta2. The, hopefully final, glitches are being shaken out of the patch now. Google Chrome has a feat
The Road to HTTP/2
I have been working on HTTP/2.0 standardization efforts in the IETF. Lots has been going on lately, lots of things are still in flux, and many things haven't even been started yet. I thought an update for Planet Mozilla might be a useful complement to what you will read about it in other parts of the Internet. The bar for changing a deeply entrenched architecture like HTTP/1 is very tall - but the
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