Performance regression (audio) between new and old core

[SilentException]

What version of melonDS DS are you using?

1.1.3

Does the problem happen in standalone melonDS?

I don't know.

What happened?

Using same settings (OpenGL and 5x resolution scale) there are frequent audio stutters and cutoffs with the new core. In the old one, there are hardly any. I uploaded two videos comparing the two and although the stutters are present throughout the video you can clearly hear the difference and errors in the last part of the video (10s+). This is with Mario Kart DS.

https://streamable.com/agqd8e (MelonDS DS)
https://streamable.com/yijm9d (MelonDS)

What should've happened instead?

Performance on par with old version :)

Which platforms do you see the problem on?

• Windows
• macOS
• Linux
• Android
• iOS
• tvOS
• Other (specify below)

Which versions of the OS?

Steam OS 3.5.19

Which libretro frontend are you using?

Retroarch 1.19.1 Flatpak

Terms

• I agree to follow the code of conduct.
• I understand that melonDS DS is not developed or maintained by the authors of melonDS.
• I understand that this form is for reporting bugs, not for requesting help.
• I understand that the author develops this core in his spare time, and that he is under no obligation to respond to this bug report.

[SilentException]

Just a quick update, I updated the core to v1.1.7 but the performance has not improved.

[JesseTG]

I'm working on cleaning up melonDS DS's integration with some profiling tools; would you be willing to take and upload a trace when I have that ready? It'll help me pin down where all the time is being spent each frame.

[SilentException]

I'm working on cleaning up melonDS DS's integration with some profiling tools; would you be willing to take and upload a trace when I have that ready? It'll help me pin down where all the time is being spent each frame.

Sure thing, yea.
I was actually thinking of closing this and #226 as they both seem to be related to Rewind. Having Rewind off the performance is acceptable, similar or bit worse than old core and I also haven't experienced any freezes.
But I can test and upload a trace file, no problem.