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From Graham Leggett <>
Subject Re: [PATCH] mod_cache fixes: #8
Date Mon, 02 Aug 2004 21:31:57 GMT
Bill Stoddard wrote:

> To get mod_cache/mod_mem_cache (I know little or nothing about 
> mod_disk_cache) really performing competatively against best-of-breed 
> caches will require bypassing output filters (and prebuilding headers) 
> and possibly bypassing or at least reworking input filters.

The initial idea was that the CACHE_SAVE filter would run as close to 
the network as possible (to cache as much of the input filters as 
possible), but over time people moved filters in front of CACHE_SAVE for 
various reasons, which has performance issues.

The ability to cache variants was made so that both an uncompressed and 
compressed variant of the same resource could be cached at the same time.

This means that a browser that does not support compressed content isn't 
going to invalidate the contents of the cache, hurting performance.


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