yslow website stats

Darren VanBuren onekopaka at gmail.com
Fri Jan 8 18:42:35 UTC 2010

The "Use a CDN" doesn't at all apply to our case. With the plentiful  
spread of proxy boxes, (which serve static content) we're a small- 
scale CDN by ourselves.

On the matter of Expires, here's what would need to be added to an  
Apache config, assuming static stuff is in /srv/web/static:

<Directory /srv/web/static>
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
ExpiresByType text/css "access plus 1 month"
ExpiresByType text/javascript "access plus 1 month"

Of course we can tweak the times, I just made up 1 month.

As for compression, yes it will increase load, but it will save users'  
bandwidth and will increase speeds on slow connections (56K, EDGE,  
EVDO). The compressed versions can be cached on disk as well so the  
load of compression doesn't matter on read-only traffic.

Moving JavaScript to the bottom of a page is also a low-hanging fruit.  
The thought is that presentation can be achieved, so users see the  
page even though the JavaScript isn't loaded.

Darren VanBuren

Sent from my iPod

On Jan 8, 2010, at 10:10, Matt Domsch <Matt_Domsch at dell.com> wrote:

> On Fri, Jan 08, 2010 at 11:07:53AM -0600, Mike McGrath wrote:
>> On Fri, 8 Jan 2010, Bert Desmet wrote:
>>> Hi
>>> mmcgrath asked me to collect some statistics about the fedora  
>>> website.
>>> He asked me to use yahoo's yslow.
>>> You can find the results here: http://bdesmet.be/upload/finished.pdf
>>> yahoo's page with extra information on every test:
>>> http://developer.yahoo.com/performance/rules.html
>> Thanks bert.  I'm wondering how much of these we can do something  
>> about
>> (the low hanging fruit)
> The "Use a CDN" messages all disappear with a config file setting
> stating that fp.o _is_ a CDN.
> Setting up better expiry times on /static/ and /web/static/ should be
> low-hanging fruit.
> Adding compression should be low-hanging fruit, but will increase the
> CPU needed on the app/proxy servers.
> CSS at top, and javascript at the bottom, I can't say, having not
> looked at the pages in question.  May be easy.
> Rest are opportunistic I'd say.
> -- 
> Matt Domsch
> Technology Strategist, Dell Office of the CTO
> linux.dell.com & www.dell.com/linux
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