Are you using official or nightlies? No matter which - try either another nighlies of the same version or try another official version I'd recommend. Otherwise I don't know how your problem can be solved...I dont have lags in menu. Its slow when starting (Commands on bottom screen) and also when run games (commands on bottom screen).
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Thanks! I'll add them to the compatibility list!New Nintendo 3DS (Luma3DS config Enable L2 Cache and 800Mhz)
Hercules (EUR):
PCSX version 1.7.1
Disabled V-sync + Audio Sync
Playable : 50 - 60 FPS with audio issues
Croc Legend of Gobbos (EUR):
PCSX version 1.7.1
Disabled V-sync + Audio SyncHarry Potter and the Philosopher's Stone (EUR):
unplayable : 20-30 FPS
PCSX version 1.7.1
Disabled V-sync + Audio Sync
unplayable : 30-35 FPS