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I've done a few projects with Sematic UI. I think it's great for desktop based business applications. It looks slick, and has great animations. Plays nice with heaps of frameworks, I was using meteor.js

However, don't use it on mobile - it will destroy performance.



Curious about this. Any clue why? Too much animation, heavy JS-use? Not familiar with how the framework does its stuff.


Only the size is an issue, the performance otherwise is great.

There is even performance debugging built in, so you can monitor how your app performs.

If you ignore the debugger and just build insane things, of course it's going to be slow...


It's just a huge amount of CSS - with lots of animations and transitions. The css is somewhat optimised, it just does lots of cray shit, lots of repaints.


It's 850k in size plus jquery.




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