WhirlWindWarp slower on Windows 11 than on any Linux Distro

[DanyGee]

I don't know why WhirlWindWarp screensaver is so slow on Windows 11 (particles fly at least 75% slower).
I'm happy that it works at all, but it needs to be as snappy on Windows as on Linux to maintain its original, pleasant dynamics.
Can anyone explain the reasons and provide a fix (if possible)?

OS: Windows 11 Pro [64-bit]
Kernel: 10.0.22000.0
Motherboard: ASUSTeK COMPUTER INC. Z170-DELUXE
Resolution: 3840x2160
CPU: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
GPU: NVIDIA GeForce GTX 1080
Memory: [ ■■-------- ] 11.64 GiB / 63.93 GiB

[katahiromz]

https://github.com/katahiromz/XScreenSaverWin/blob/master/common/xws2win.c
https://github.com/katahiromz/XScreenSaverWin/blob/master/nongl-savers/whirlwindwarp.c
Have a look at these files.

XFillRectangle and XDrawRectangle functions are emulated from X11 to Win32. The emulation of these functions are slow as you look.

[DanyGee]

OK, thanks for the explanation.
Is any workaround/fix planned?

[katahiromz]

A little optimized now.