Double requests for css

Web Performance Discuss Test Results
1

I’m a bit confused.
Running the test on my site the css comes up twice in the results even though there is only one call to it.
As a test I made a basic page and still the same result
http://www.webpagetest.org/result/110603_J0_RGFT/1/details/
There is two request for it in the Headers page and there is two listings for it in the Details View

Am I going mad…[hr]
Ahhh 5 seconds later and I’ve found the reason
I use //www.blah.com instead of http://www.blah.com for links to css etc so it works on encrypted and non encrypted pages
But why is it still being requested twice

2

Curious, never seen that before. It doesn’t look like your test page has any structure to it (, etc - just the css - could that be causing it as well?)

3

No I just put that up to demonstrate the problem knowing that nothing else could be pulling in the css.
My actual page has everything etc. http://www.webpagetest.org/result/110603_ZH_RGFC/[hr]
Note its only the css file that is pulled twice, everything using this format (js, images etc) is only pulled once.

4

I’ve actually change the code now so it uses the relevant address and now I have the coveted 6 A’s

5

Hi Pat,

Same thing here: WebPageTest Test - WebPageTest Optimization Check Results

It shows two css in some runs and not in others.

I wonder if it has anything to do with CDN implementation. That’s the only change I’ve added into site.

Best Regards,

6

I just looked at the page and seems like http or https protocol is missing for the CSS.

“Internet Explorer 7 & 8 will download stylesheets twice if the http(s) protocol is missing”

You can see more info from Steve’s blog post here - 5a Missing schema double download | High Performance Web Sites

7

Thank you Prasath!

That is incredible as mod_pagespeed strips & rewrites those protocols. This is one for the books.

I’ll make changes soon.

Regards,

8

Great to know Prasath!