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Editorial Team
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Asked: 2026-05-26T13:47:22+00:00

I have built a site, where there is a lot of jQuery/javascript, but i

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I have built a site, where there is a lot of jQuery/javascript, but i do not think there is too much compared to other sites.

Try the site here and the scrolling (only html output so you do not have to create an account): http://www.fitlab.dk/fitlab.htm

It is in Chrome it is really bad, compared to Firefox where the performance is better, stange because I also thought Chrome had the best javascript performance.

But how can know what is causing the scrolling to be slow?

I tried remove jQuery “extensions” one by one, so I could tell which what causing the problem, but I could not find the problem.

I know Chrome has this where you can test the CPU, what processes use how much power.

Here is an screenshot of the final results where i have scrolled a lot and recorded it:
CPU Performance

That do not give a lot of information, it actually do not know what to use that information for :-/

I would be really glad if somebody would help me, thank you! 🙂

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1 Answer

  1. Editorial Team

    Please try removing all the CSS and see if the performance improves. I have seen scrolling lag when large background images are there, especially when the background is fixed.

    Also could you try removing one jquery plugin at a time to find out if any plugin is causing the issue?

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