32bit application runs sloooow

[Mac_user]

I have been running my 32bit CAD on a MacBook with Parallels and Windows 10 for a long time with rather acceptable performance.
After crashing my MacBook I got myself a new one, latest version with M1 processor, identical memory setup. This forced me to install Windows 11 with the latest Parallels version. Which runs flawlessly. The CAD however became unbearably slow.
Meanwhile I spent hours trying out different memory allocation preferences up and down with no success. It appears to me that the issue is how Windows 11 is handling the 32bit program.
Any suggestions where I should look for to speed up the program again?

 

[interlocutor1980]

32-bit program cannot take full advantage of the 64-bit architecture. So I suggest 64bit instead of 32bit.

 

[Mac_user]

I would gladly upgrade to a 64bit CAD but I can't afford the expenses for a new CAD. My point is that it ran nicely on Windows 10 with a slower processor. Now it's the latest processor and the latest system software and I get a crawling application.

 

[interlocutor1980]

Lots of 32bit applications have compatibility problem with Windows 11 that's why I ask to switch. Use Windows 10 instead for slightly better performance.