CODEWITHSUNDEEP
javascripthtmlextjs
talhatahir
talhatahir

Reputation: 85

Performance issues in IE11 using ExtJS 4.2.1

I am facing performance issues with Tabs Panel for IE9 (and above) if I even open just 2-3 tabs with HTML document of size varying from 1MB to 20MB. Then on switching between tabs it’s taking around 3-4 seconds (when page has only tab panel) and around 5-6 seconds (when page has a lot of other extjs components) on IE-11. The response is almost 1-2 secs on IE8 which is very surprising.

I also tried with different hideMode options (Display, offsets, visibility, asclass) but with not much benefit although hideMode='asclass' is comparatively fast than other options.

I also created a sample page to confirm if it is really document size issue or extjs component issue. Created simple tabs (with divs) without any JS library and just changed their css z-index (instead of css display or css visibility) and they were switching instantly (on all IE versions). Trying the same solution on a separate page for ExtJS doesn't help on IE11 (somewhat faster on IE8). So it seems to be ExtJS specific issue.

Has anyone else ever faced this issue? Any comments or solutions would be greatly appreciated.

Upvotes: 1

Views: 2500

Answers (1)

dingdong
dingdong

Reputation: 169

You can use the profiler for IE to see whether any scripts related to ExtJS 4.2.1 take a long time to load. If you discover such a script, you can then proceed to making a bug report for this library.

Here's some detailed information of how to do JavaScript profiling in IE.

Profiling JavaScript performance

Upvotes: 5

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