On 6/17/2011 10:50 AM, Brian J. France wrote:
> Bill (or anybody),
> 
>   By chance do you remember any details of this change (it has been almost 10 
> years)?
> 
> http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/server/request.c?r1=91168&r2=91169&;
> 
> I am interested in this part:
> 
> +    /* Skip authn/authz if the parent or prior request passed the 
> authn/authz,
> +     * and that configuration didn't change (this requires optimized _walk()
> +     * functions in map_to_storage that use the same merge results given
> +     * identical input.)  If the config changes, we must re-auth.

That goes back to 1.3 prior to the optimization, how we skipped authn/authz
for identical subrequests.  The cache/walk logic simply changed where such
an optimization should occur, IIRC.

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