Read the statement by Michael Teeuw here.
MM on RPi3 is Extremely Slow
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 I am running MM on a RPi3B. I thought that it was freezing because after 10 minutes of running normally, the clock module will stop ticking and then the whole system becomes unresponsive. I tried ssh’ing into the box and after minutes, I got a prompt and was able to execute an ‘ls’ command, so I know the system is alive and just moving very slowly. The MM display still doesn’t update. I was wondering if anyone had tips on how to get MM running smoothly on a RPi3B? I don’t want to switch to a Pi4 or Pi5 because they don’t support changing the brightness (and the Pi3B does) and this is a critical feature for me. Thank you so much for your help. 
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 @raspberrypi9 what os are you running? should be 32 bit legacy ibthink 
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 @sdetweil I’ve tried it with Bullseye 32-bit and Bookworm 64-bit 
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 @raspberrypi9 do 
 free -mthis will tell you how much memory and swap space you have and are used. swap on sd cards is terrible 
