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Date: Tue, 22 Apr 2008 13:37:10 -0600
From: Scott Long <scottl@samsco.org>
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To: Poul-Henning Kamp <phk@phk.freebsd.dk>
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Cc: freebsd-current@freebsd.org, Jille <jille@quis.cx>
Subject: Re: Http Accept filters (accf_http)
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Poul-Henning Kamp wrote:
> In message <480E307B.901@quis.cx>, Jille writes:
>> Hello,
>>
>> I've read about accf_http(9) some time ago, and I was wondering about 
>> it's performance.
>> Does it increase performance on all workloads ?
>> (I'm intrested in the improvements for a PHP-apache-webserver with about 
>> 50 request/second average.)
> 
> I doubt you will see measurable performance difference from using
> request filters at such low traffic.
> 

The accept filters do reduce service latency and probably have a small
benefit in CPU utilization.  50 requests/sec is probably enough to see
a benefit for something like PHP or PERL.  It definitely won't hurt, and
even if there's no measurable benefit now, it'll help prepare you for
scaling in the future.

Scott