I want to scale images to 400x400 (I am creating thumbnails). I am using the Scriptable Image Processing System (SIPS) in a Cocoa application, but the problem is poor efficiency. SIPS takes 70-90% CPU while converting 300 images in 20 seconds. Should I use the CIImage class (CIImage is the type required to use the various GPU-optimized Core Image filters) or NSImage class? Can anyone suggest a better method?
I tried thumbnail genration using NSImage , CIImage and sips. All are taking same CPU (70-90%) usage but sips is faster.