Photoshop file saving single threaded w/ compression  

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Castillonis
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Photoshop file saving single threaded w/ compression

by Castillonis » Thu Oct 06, 2011 11:15 am

My friend Dan sent me this link which explains the long save times for .psd and .psb files. There is a plugin for saving certian 16 bit files without compression which greatly decreases save times. Hopefully Adobe will multi thread saves and allow you to turn off compression which would make the task IO bound versus single core CPU bound.

http://macperformanceguide.com/OptimizingPhotoshop-SavingOpening.html
Last edited by Castillonis on Thu Oct 06, 2011 11:16 am, edited 1 time in total.

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Castillonis
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by Castillonis » Fri Oct 14, 2011 11:14 am

I am hoping that people who edit / retouch large photoshop files such as gigapixel images will read this post. There is a plugin that eliminates compression for 16 bit PSD files with multiple layers. Again, Photoshop uses compression for PSD files that contain layers and the code is implemented as a single thread. The plugin appears to only be for CS5, so I am out of luck because I still use CS4. Read the articles at the links below to understand how this affects the efficiency of your editing / retouching work flow of large images.

DisallowFlateCompressedPSD
http://macperformanceguide.com/PhotoshopCS5-performance-DisallowFlateCompressedPSD.html

EDIT: Sam Rohn provided a link on hdrlabs.com that says that this works for 8 bit files and that it is a registry entry for Windows.
http://kb2.adobe.com/cps/902/cpsid_90248.html
The plugin will not stop the use of compression for 8 bit files. It will eliminate compression for 16 bit files.
This causes the save functionality of Photoshop to be less CPU bound and possibly IO bound again.
Last edited by Castillonis on Sun Oct 16, 2011 12:17 pm, edited 1 time in total.


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