# \[performance\] UI thread

**URL:** <https://react-native-webrtc.discourse.group/t/performance-ui-thread/1018>\
**Category:** iOS\
**Created:** [November 6, 2020, 3:13pm UTC](https://react-native-webrtc.discourse.group/t/performance-ui-thread/1018 "2020-11-06T15:13:06Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Pondia](https://avatars.discourse-cdn.com/v4/letter/p/c5a1d2/32.png) [@Pondia](https://react-native-webrtc.discourse.group/u/Pondia)\
**Post date:** [November 6, 2020, 3:13pm UTC](https://react-native-webrtc.discourse.group/t/performance-ui-thread/1018/1 "2020-11-06T15:13:06Z")

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Hi,

I would like to know if anyone else encounters performance issues on UI thread. I have already gone through all the topics concerning this subject on this forum and the gihub issues.

For the tests, I wrote a minimal code between 2 peers using an SFU and check the Perf Monitor & Chrome devtool.

On publisher side : UI & JS thread values are 60 on Perf Monitor.  
On subscriber side : UI thread varies between 27 and 36 / JS thread is stable at 60.

If anyone has more data to share on this, please comment.