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In CS4, on a first generation quad core Mac Pro with 12 gigs of RAM and scratch and all image files on a fast two disk RAID 0, I find that saving psd files with layers is extremely slow.
If I open a 16 bit 12 megapixel D300 raw image from Lightroom into Photoshop, and immediately save it, it takes just 1 to 2 seconds to save the 60 megabyte file. But if I duplicate the background layer and save again, it takes about 15 seconds. If I duplicate two more times so there are four layers, it takes over 30 seconds to re-save the now 286 megabyte file.
Why does this take so long? Are these numbers normal? Is there anything that can be done to speed this up? I can duplicate the file in Finder in less than 4 seconds, so I assume this has nothing to do with disk bandwidth.
And why does saving files have to be modal? If I could start the save then switch over and start working on a different image I really wouldn’t care how long it took.
If I open a 16 bit 12 megapixel D300 raw image from Lightroom into Photoshop, and immediately save it, it takes just 1 to 2 seconds to save the 60 megabyte file. But if I duplicate the background layer and save again, it takes about 15 seconds. If I duplicate two more times so there are four layers, it takes over 30 seconds to re-save the now 286 megabyte file.
Why does this take so long? Are these numbers normal? Is there anything that can be done to speed this up? I can duplicate the file in Finder in less than 4 seconds, so I assume this has nothing to do with disk bandwidth.
And why does saving files have to be modal? If I could start the save then switch over and start working on a different image I really wouldn’t care how long it took.
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