Sudden repetitive sluggishness & unresponsiveness - who's the culprit

Hello guys, recently I am facing very long app installation time (even smaller apps) as well as sometimes screen unresponsiveness at that time in my G4. but I don't know why it's happening. it was fast & smooth before. I am using rooted 10E EUR on my H815T. and yes, I have quite a few xposed mods installed and installed apps r also quite high.
So can someone guide me to find out the culprit here?
Thanks in advance.

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