[horde] Performance problems reloading the sidebar with HTTPS and IE

[Han Spruyt]

>> I'm wondering what Apache HTTP server version you are using?
>>
>> In this case 1.3.34.
>
> Ghm. I don't know how about your version, but on my machines (apache 
> 2.0.46 on redhat enterprise linux 3.0) I had similar problem. I 
> solved it by commenting out:
>
> #SetEnvIf User-Agent ".*MSIE.*" \
> #         nokeepalive ssl-unclean-shutdown \
> #         downgrade-1.0 force-response-1.0
>
> in ssl.conf. As far as I know all new redhat versions comes with this 
> old apache ssl configuration file.
>
This solves something in the latest IE 6 versions, but breaks 
compatibility with IE 5.

It makes IE about as fast as Firefox in SSL connections because of the 
keepalive.

There is good information about this stuff here:
http://www.gossamer-threads.com/lists/apache/dev/299145

It is not a solution though for the problems with the 304's in the access log.

The problem was, the cache content expired immediately, so browsers 
asked for new versions of every element on every page load.

With setExpires on in the apache config the browser only askes for new 
versions of dynamic content. On a not so small site that saves a lot of 
SSL traffic. It really speeds up things for the user. We suffered page 
load times of up to 2 minutes, which is now reduced do a few seconds at 
most.

Han.



Han Spruyt.