Does HTTP caching still matter?
Back when I first got involved in the Web, caching of HTTP
responses was a big deal. Indeed, a lot of the features
in HTTP 1.1 are concerned with various kinds of cache
interaction (specifying lifetimes, busting caches, dealing
with noncompliant or old-style caches). Even now, a very common objection
to hear to any change to HTTP is that it won't interact well
with caches. Lately I became curious: are caches still important?
I'm not talking about content distribution networks like
Akamai but conventional caches that aren't operated by the
server. Does anybody know what fraction of HTTP traffic goes
through caches these days?
For discussion: how would you
estimate the answer to the above question?
Posted by ekr at July 9, 2004 08:05 AM
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