Gradius Collection

[FOPSP]

Some special effects in this collection cause slowdown. I noticed it at one boss in Gradius II. It was very brief, so it wasn't a big deal. But in Gradius III it seems to be more common. Some of the sand dragons and boss in the first level shoot particle weapons that spread out in multiple directions, which trigger the slowdown. Switching to Direct 3D 9 fixes the issues for me (probably just doesn't slow down enough for the FPS to drop down below 60 anymore).

This issue makes it the most demanding PSP game I've played on PPSSPP so far.