# Many qMRMLThreeDWidgets impact application performance

**URL:** <https://discourse.slicer.org/t/many-qmrmlthreedwidgets-impact-application-performance/19539>\
**Category:** Support\
**Created:** [September 7, 2021, 12:07pm UTC](https://discourse.slicer.org/t/many-qmrmlthreedwidgets-impact-application-performance/19539 "2021-09-07T12:07:37Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![xianger-qi](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/xianger-qi/32/11944_2.png) [@xianger-qi](https://discourse.slicer.org/u/xianger-qi)\
**Post date:** [September 7, 2021, 12:07pm UTC](https://discourse.slicer.org/t/many-qmrmlthreedwidgets-impact-application-performance/19539/1 "2021-09-07T12:07:37Z")

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If my application which base on slicer, need many qMRMLThreeDWidget, may be more than 10 qMRMLThreeDWidget. Is this will degrade the window rendering perfermence? and how do i do? Thanks for your help!

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [September 7, 2021, 5:18pm UTC](https://discourse.slicer.org/t/many-qmrmlthreedwidgets-impact-application-performance/19539/2 "2021-09-07T17:18:24Z")

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There will certainly be overhead but exactly how much depends on the data and how often you update it. The best thing to do is make a small example script and see how it performs. Use a profiling tool if you can to see where the application is spending time.