OK, I've had a busy day, but got around to do one simple speed test, comparing Photoshop 7.0 beta 43 to Photoshop 6.0. The test was done on a DP 800, with 256 MB RAM using OS 9.2.1 and OS 10.1.1: New file (1000x1000pixx800dpi), filter clouds, then filter radial blur, amaunt 20, best: Photoshop 6 (OS 9): 21 sec. Photoshop 7 (OS 9): 10 sec. Photoshop 7 (OS X): 10 sec. No dif between OS 9 and OS X in PS 7, but huge dif form PS 6 to 7. Thought Quartz would help a bit, but this small little test IS mainly number crunching. I'll post more speed tests as I have the time. I'll try different filters, scaling, and other Photoshop stuff in the next days.