I have been testing the new M4Pro and M4Max chip on a Mac Mini(12 core , 24Gb ram) and a Macbook Pro (16 cores, 64Gb ram), and the results where quite good until I start testing some flip simulation, the M4Max was almost twice faster than my PC (Ryzen 9 9300x, 128Gb Ram, RTX3090) , but when I pushed the particle separation, something weird start happening, as soon as the simulation has more than 3Million particles, it sarts to slow down exponentially making the simulaton super slow. while the PC was simulating around 12 millions particles (2min per frame) , the Mac was taking more than 10 min per frame for just 4Million particles.

I did the same test on Houdini 20.0 and Houdini 20.5, I also tested the same file on a Macbook pro m2Max (12 cores, 32Gb ram) and had the same weird results.

Anyone wiht an Apple Silicon had experience the same issues when doing flips?

I attach the file if anyone with a Apple Silicon wants to do a test.. thing start to slow down frome frame 80, aound frame 95 , it's almost stuck.

I can reproduce this on an M1 Ultra. Can you please submit a bug to support so that this doesn't get lost?