Active Level 3
After Update October Security Patch..
My M30S is Too Slow

Worst Update Samsung Admins
Expert Level 5
ram management is not good in this update maybe you are feeling lag because of that..
try clearing cache partition and enable reduce animations.

my review on this update
Expert Level 5
try these steps and lets see

A. Wipe Cache Partition.
Steps to perform.
1) Turn off the device.
2) Press and hold the Volume Up key and the spower button.
3) When the Android logo displays, release all keys.
4) Press the Volume down key to navigate and select "Wipe cache partition".
5) Press Power key to select. When the wipe cache partition is complete, Select Reboot System.
6) Press the Power key to restart the device.

B. Reset App Preferences.
Settings >Apps> Tap on Top Right 3Dots and select Reset App preferences.