My Nexus6 became laggy (rooted)

Hi,

I running this rom and recently it becam quait laggy.
The rom: MRA58K [Lite] ROM.

Do you have any recommendation for other rooted rom?
Or maybe it just a matter of a version (update to the recent one)?
Basicly I like it CLEAN and that's is why I using that rom(exactly the same as stock)

Thanks!

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