Guy. If anyone says don't update to One Ui 5.1 due to lag animation, i got solution for it.
After update, do these steps.
Clear Cache Partition
- Connect to your computer using cable- Turn off - Click Power Button+Volume Up button - Choose Wipe Cache Partition - Reboot - DONE
Download Good Guardian.
If your country don't have that, then goto Playstore find FINE LOCK and install Good Guardian. In Good Guardian there's an app call GALAXY APP BOOSTER. This GAB is to optimise your phone after update to best top user experience it can perform.
Once it is done, you will notice your phone is smooth as a new 1.
Nice information and thank you for sharing too.
Hope it help.