Emulator

While for saving/loading files, EXI timings aren't bad, there are certain operations that are much, much slower than console. I've noticed it in a few areas.

Metal Gear Solid: The Twin Snakes - When a memcard has a lot of saves, the emulated game will lag on the load save screen. It does not lag on console
Mega Man X Collection - When a memory card is present, will lag on checking memory card on boot. This lag does not occur on console.
GC Karaoke games - Audio input from GC Microphone is greatly delayed
Mario Party 7 - Microphone input is greatly delayed
Other games - Similar issues as these.

Anyway, I'm just combining it into one bigger issue so that we don't have half a dozen smaller issues floating around and clogging things up. We have too many issues to keep track of as is.