Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
This thread was archived. Please ask a new question if you need help.
Archived

Slow to render pages, especially compared to IE8!

Firefox Troubleshooting
cor-el replied
AndyOfEngland
AndyOfEngland

Hi,

I've been involved in the writing of a HTML5 web-app, but there's one consistent issue we experience.

The app works in all browsers (IE7+, FF, Chrome etc) but, there's one significant difference between ALL IE versions, Chrome and FF.

The pages render so faster in all the others than they do in FF (Latest release).

The difference is staggering.

Whilst the pages do have a lot of JS+CSS, there's an enormous lag between the content being downloaded to the browser and, it running it to enhance the page.

As a little background, the site makes heavy use of JQuery, JQueryUI and a number of other techniques. Some of the pages can contain 30+ CSS and 30+ JS files (Combined and Minified in production, but still as slow). Once the page has fully rendered, the performance in usage is fine (comparable to the rest) but, it's this significant delay that's really puzzling and, more importantly, affecting the end user experience.

I'd welcome any suggestions, questions etc. on what can be done / what more you need to know in order to assist.

(Regarding the hardware being used, I don't see this as a factor as it works fine in all other browsers but, my specific setup is a Quad i7, 8GB RAM, SSD, Win 8)

Cheers

Andy

Hi, I've been involved in the writing of a HTML5 web-app, but there's one consistent issue we experience. The app works in all browsers (IE7+, FF, Chrome etc) but, there's one significant difference between ALL IE versions, Chrome and FF. The pages render so faster in all the others than they do in FF (Latest release). The difference is staggering. Whilst the pages do have a lot of JS+CSS, there's an enormous lag between the content being downloaded to the browser and, it running it to enhance the page. As a little background, the site makes heavy use of JQuery, JQueryUI and a number of other techniques. Some of the pages can contain 30+ CSS and 30+ JS files (Combined and Minified in production, but still as slow). Once the page has fully rendered, the performance in usage is fine (comparable to the rest) but, it's this significant delay that's really puzzling and, more importantly, affecting the end user experience. I'd welcome any suggestions, questions etc. on what can be done / what more you need to know in order to assist. (Regarding the hardware being used, I don't see this as a factor as it works fine in all other browsers but, my specific setup is a Quad i7, 8GB RAM, SSD, Win 8) Cheers Andy

All Replies (2)

the-edmeister
the-edmeister

Do you have a test case which doesn't require login credentials?

cor-el
cor-el
  • Moderator
  • Top 10 Contributor

A good place to ask advice about web development is at the MozillaZine "Web Development/Standards Evangelism" forum.

The helpers at that forum are more knowledgeable about web development issues.
You need to register at the MozillaZine forum site in order to post at that forum.