Xemu works at half fps/speed instead of full speed

[ViviNoSmol]

Bug Description

Xemu works at half speed

1 - Open Xemu
2 - Start any game (in this case Jet Set Radio Future in NTSC region)
3 - See how the game works more slow than usual
4 - Open Debug video and see how all the emulator is working at 45 fps, without audio slowdowns, in every game.

Expected Behavior

Xemu should work at 60 fps or full speed instead of slowing down games.

xemu Version

Version: 0.8.58
Branch: master
Commit: d593869
Date: Thu May 1 06:47:37 UTC 2025

System Information

CPU: AMD Ryzen 7 5700G with Radeon Graphics
OS Platform: Windows 11
OS Version: 24H2
Manufacturer: NVIDIA Corporation
GPU Model: NVIDIA GeForce RTX 3060 Ti/PCIe/SSE2
Driver: 4.0.0 NVIDIA 576.28
Shader: 4.00 NVIDIA via Cg compiler

Additional Context

There isn't ANY fps limiter or anything that could limit xemu FPS, already tried with reinstaling drivers and doing a cleanoff, also closing any program in the background and still no effect.

[Triticum0]

It might be the APU. In some game if the APU not running in real time can cause some game to not run at full speed. Try Real time DSP see if it makes a difference.

[ViviNoSmol]

It might be the APU. In some game if the APU not running in real time can cause some game to not run at full speed. Try Real time DSP see if it makes a difference.

Sadly nope :(

[mrdc]

It might be the APU. In some game if the APU not running in real time can cause some game to not run at full speed. Try Real time DSP see if it makes a difference.

I have the same issue on macOS ARM64 - DoA 3 is slow during the game: 1/2 speed. Sometimes when a camera moves, this bug disappears and fps rise up to 50-60. I'll make a separate issue with a video.

[pittcola]

yo, if u havent tried already, change the backend to vulkan. worked for me (*￣▽￣)b

[mrdc]

See how the game works more slow than usual

Just guessing: maybe, this issue is caused by improper work with 120Hz+ VRR displays? Some sort of timing issue. I've seen it on Mac several times in other apps, which were not updated for 120Hz VRR displays.