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From Henrik Nordstrom <hen...@henriknordstrom.net>
Subject Re: OpenSSL compression (Windows)
Date Fri, 21 Sep 2007 23:39:29 GMT
On fre, 2007-09-21 at 11:06 -0400, Tom Donovan wrote:

> Already-compressed data; like .jpg, .gif, .png, .zip, .tgz, .jar, and 
> any content filtered by mod_deflate are re-compressed.  This uses 
> non-trivial CPU cycles for no (or slightly negative) benefit.

Bot yes and no. Unlike HTTP, SSL compression applies to the whole
datastream including request & response headers, not only the object
body. So exchanges of small objects over a persistent connection is
likely to compress quite well even if the exchanged object as such is
already fully compressed.

But it may be a problem for large exchanges, or when KeepAlive is off..

Regards
Henrik

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