AROS for Amiga OS (AFA OS) 4.6

[AmigaMance]

I do some tests years ago on my 233 MHZ 604 PPC Card and find out that this PPC datatype give near no speedup.i test with multiview and large pics with a stop watch until pic is show.

 You must have done something wrong. The increase of image decoding speed (specially of JPGs) should have been easily noticable on a 604 running at 233Mhz, without the need for a stop watch.

and on slower CPU it can maybe slower with PPC dataype.The 603 have smaller caches and memory speed on 603 Cards is half as 604.so teh context switch that store data to mem is more slow on 603.

 Image decoding is still much faster on a slow 603 Vs a 68040. I haven't done any comparisons with a 68060, but many people have said that the 603 still outperforms it.

[AmigaMance]

You must have done something wrong. The increase of image decoding speed (specially of JPGs) should have been easily noticable on a 604 running at 233Mhz, without the need for a stop watch.


 Image decoding is still much faster on a slow 603 Vs a 68040. I haven't done any comparisons with a 68060, but many people have said that the 603 still outperforms it.

 Sorry, but i forgot an important factor regarding this issue.
Were you running AOS 3.9 when you did the tests? If you didn't, then the OS was using a 68k-only picture.datatype, which would explain why you did not experience better performance due to the excessive context switching, as you said. What i wrote is true for AOS 3.9 where the picture.datatype is 68/PPC.