Plus42 for Windows - Why so slow?

[Thomas Okken]

Phones are pretty fast nowadays.

Also, the Windows version is a 32-bit executable, while the Android version is a mixed 32-bit / 64-bit apk. If your phone has a 64-bit CPU (and I think by now they all do), that would give it an extra edge.

You could also try taking the time spent updating the display out of the equation, although it probably won't matter much: put an AVIEW or VIEW before your loop, so the display will remain static while the program is running.