I noticed the other day when upgrading from 1.5.1 to 1.5.2 a dramatic performance hit when processing just a single image, even in the preview mode, prior to saving.
What took about 5-10 seconds to re-render a typical low res 1024x1536 image in 1.5.0, I now started seeing the process hang on the last phase of processing and grind to crawl.
Just working on a typical image now was taking upwards of a minute or more JUST to preview (not even saving at this point)
Became very dramatic when queing up about 10 images. What took maybe a minute before, now took… over 10 minutes.
I backed down to 1.5.0 and all the speed returned. Previews back to normal 5 second range while tweaking settings, and saving out a batch of 20+ images, each image rendered/processed at a steady pace (this part is key) all through all 20 images. Render/save time for each image, 5-10 seconds or so and about 2 minutes over more or less.
I updated then to 1.5.1 again and first… it seemed ok. The preview/tweaking part for a given image seemed ok. One image. No issues.
Where the problem started coming back was when 10 or more images were dumped into topaz (something I could do 40+ with under 1.5.0) and then try to save out.
the first 3 or 4 images… about normal speed… and then slower and slower as each image processed and saved.
This part of the process… for each image… got slower… and slower. Unlike 1.5.0 that was a stead speed, 10 seconds max per image
20 images was now back up to like a 10 minute processing time.
Not as bad as 1.5.2… but MUCH much slower than 1.5.0
I backed it down again, dumped in 40 images into the 1.5.0 queue… and back to steady and speedy processing of each image all the way though.
My guess? 1.5.1 introduced some serious memory leak. 1.5.2 introduced on top of that, some performance/GPU issue. Combined 1.5.2 is basically unsueable for me.
1.5.1 is useable, but only 1 image at a time.
Corei5 3.5ghz 16gb, Nvidia GTX 1060 3GB GPU.
Def not the latest and greatest specs but was super fast for me through 1.5.0