# OH4 Basic UI very slow

**URL:** <https://community.openhab.org/t/oh4-basic-ui-very-slow/150134>\
**Category:** Items & Sitemaps\
**Tags:** basicui, sitemap, oh4\
**Created:** [October 5, 2023, 7:38pm UTC](https://community.openhab.org/t/oh4-basic-ui-very-slow/150134 "2023-10-05T19:38:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![MartinOpenhabFan](https://community.openhab.org/letter_avatar_proxy/v4/letter/m/898d66/32.png) [@MartinOpenhabFan](https://community.openhab.org/u/MartinOpenhabFan)\
**Post date:** [October 5, 2023, 7:38pm UTC](https://community.openhab.org/t/oh4-basic-ui-very-slow/150134/1 "2023-10-05T19:38:15Z")

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Hi,

so after upgrading to OH4 I migrated my sitemap from the file based configuration to the UI configuration and created a page where I just copied the whole sitemap into.  
I don’t know if this is the reason, but when I restart OH4, it takes ages to load the basic UI in the Android app for the first time, I usually get timeouts and have to reload. I have a lot of sub-pages and with everyone of them I face the same issue - loading for the first time, timeout, wait for some seconds, reload.

This has not been the case in OH3 and before, I was used to restart my server each day because of OutOfMemories or other issues. The good thing is that since OH4 I didn’t face such issues anymore, the bad thing is that I’m always afraid of restarting my server…

Runtime Environment: Openhabian on Raspi4 4GB