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Ridiculously slow results for Plone CMS sites
02-12-2011, 12:40 AM
Post: #2
RE: Ridiculously slow results for Plone CMS sites
Yes, the site really is that bad from looking at it. There are a couple of key things that are making it excruciating:

1 - Keep-alives are disabled. EVERY request on the page needs to make an extra round trip to set up a new connection and the further you get from the server the slower it is going to be (it will probably look a lot faster if you test from the Brazil agent). A simpler server configuration tweak will cut the load time in half. If I had to bet I would guess that they are using an old Apache config that disables keep-alives for IE so it might seem a lot faster in Firefox or Chrome.

2 - There a TON of resources all as separate files. It would be significantly faster if those tiny icons were in a sprite, the css files were merged and the javascript code was merged (probably cut in half again).

The site may feel faster in a more modern browser (IE8, Firefox, Chrome, Safari) because they will open more parallel requests to the server. IE7 will only open 2 connections at a time while the more modern browsers open 6 so they will be able to download 3x as many things at the same time.

If you're using something other than IE it probably feels a lot faster than this because of the increased number of parallel connections and keep-alives working (those 2 alone would cut the load time down to ~1/5 or 1/6 of what IE7 is seeing).

And no, it's not unusual to see really high profile sites perform like crap Sad
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RE: Ridiculously slow results for Plone CMS sites - pmeenan - 02-12-2011 12:40 AM

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