In article ,
"pico" writes:
"Warren Sarle" wrote in message
Illustrator has multithreading, but I find no mentions of Photoshop CS3 having it. How could you tell even if you did have a quad processor machine?
Very simple. Run something and see how many of the cores/processors are busy.
Some things in Photoshop CS3 are multithreaded and some are not. For example, .psd I/O is multithreaded, but .tif I/O is not.
That is all there is to it?
I have a MacPro with 4 processors and according to the monitor they are always busy when a process is busy. No processor is ever idle. Very often they are alike in response.
On Windows, when I save a .tif file, one core is very busy, while the others show low levels of system activity. When I save a .psd file, all 4 cores are veru busy. Similar things happen with various filters, that is, either one core is very busy and the others almost idle, or all 4 cores are very busy. Of course, this is when no other applications are running.
Perhaps Photoshop has more algorithms multithreaded on Macs than on Windows. Perhaps Macs are better at distributing system calls across cores/processors.
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Warren S. Sarle SAS Institute Inc. The opinions expressed here SAS Campus Drive are mine and not necessarily
(919) 677-8000 Cary, NC 27513, USA those of SAS Institute.