Here's an interesting bug. :-p http://webforscher.wordpress.com/2010/05/20/ie-6-slowing-down-ie-8/

It seems the presence of conditional comments in the midst of CSS links can cause IE8 (unsure about IE9) and earlier to pause loading of CSS for some indeterminate reason. And, presto! performance problem.

The solution is to put a conditional comment before any CSS is loaded on the page.

We could add a conditional comment to the $head variable in html.tpl.php.

Comments

johnalbin’s picture

johnalbin
they/他
Primary language English
Location Taipei, Taiwan
commented
Title: Conditional comments can sometimes slow down IE » Conditional comments can slow down all versions of IE
Priority: Normal » Major

Its been confirmed that the problem affects IE9 as well. Booo!

klonos’s picture

klonos
he/him
Primary language English
Location 90% Melbourne, Australia - 10% Larissa, Greece
commented

Yep, it seems that adding an empty conditional rule (<!–[if IE]><![endif]–>) at the top of all other rules solves the bug.

...stupid IE/MS :/

astonvictor’s picture

astonvictor commented
Issue summary: View changes
Status: Active » Closed (outdated)

I'm closing it because the issue was created a long time ago without any further steps.

if you still need it then raise a new one.
thanks