GYM playback struggles significantly with GCC 9

I’m not entirely sure why but GYM playback with the default ‘Nuked’ emulator is extremely laggy and glitchy with game-music-emu. Using the base gme_player on any GYM file I try, and I get lots of: “ALSA lib /var/tmp/portage/media-libs/alsa-lib-1.1.8/work/alsa-lib-1.1.8/src/pcm/pcm.c:8424:(snd_pcm_recover) underrun occurred”.

LLVM 8 seems to work better (although CPU usage is still quite high), but this may be due to usage of -fLTO which seems enabled by default.

Unless I can get this sped up I’ll probably have to switch the default back to GENS or MAME.

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