Since i was using memu 3 (from the old guide) with feh untill today, after update 3.4 it started crashing so i decided to upgrade to memu 6 to see if it fixes the problem.
Both android 5 and 7 instances are incredibly slow (like 20 seconds to open google play store) for me (using the old guide for memu 3 it was working perfectly in 60 fps).
Im on samsung ativ book 4, with i5 3230M + Geforce 710M, 8 gb ram and running on SSD. Not the best specs but still not that bad, and as i said memu 3 used to work flawlessly (and actually blustacks 4 which i used for azur lane worked without any problem too so its probably something broken in memu with combination of my laptop (im using the new memu on my PC at home and it works fine too)).
So if someone still uses old memu 3, dont update, it might break everything (tho if feh doesnt work in it anymore then i guess it doesnt matter)