Additional Information on Photoshop CS4

To complement information we published yesterday, Arstechnica reviewed Photoshop CS4. While description of the interface and/or the changes when compared to CS3 might be useful for some users, other information affecting performance level might be even more critical:
- Open GL acceleration for redrawing windows is limited by both the VRAM available on the graphic card and the display resolution. Indeed, a MacBook Pro featuring a graphic card associated with 256 MB of VRAM and plugged to an external display with a resolution of 1920x1200 will only be able to get 7 windows with Open GL-based accelerated redrawing.
- Then the Mac 32-bits and PC 64-bits versions were compared. With small size file, around 50 MB, the Mac is slightly faster, however when dealing with much larger image file (here 900 MB), the PC version is 20% faster. This difference might be directly linked to the capacity of the 64-bit version to allocate more than 3 GB of RAM.