Dominik Rodler comments

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                                            Dominik Rodler

Delay progress bar if page is loaded within N ms

Anything below ~ 500 ms does not need an indicator from a user's perspective. Always showing the progress indicator in fact deteriorates user experience for fast page loads, because it...

Performance degradation with large forms: validateAllFields triggers O(n²) store updates

That's actually not that much of a problem. Around 200-300 MB? The primary issue is CPU load, secondary is number of DOM nodes. I have attached a performance trace (with...