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I use Crop tool often, and before 1.9 update, it was fine. But, since upgrade to 1.9 (and still present in 1.9.1), when I select region to crop, click on Apply button, and there is clear delay until the crop is done (approx. 2 seconds), and for a brief time, cropped image is wrong (showing top left part of the image), and then it renders properly. When this happens, CPU usage jumps to 100% on all 8 logical cores.

Before 1.9, all was OK, crop was instant. Also, this doesn't happen always, but it it happens very often to be annoying, especially, if I use crop often. I use Windows 10 20H2 64bit, Lenovo ThinkPad L480 with Core i5 8250 4 Core, 8 Threads CPU, 16GB RAM, 2xNVMe SSD drives. Affinity Photo before 1.9 was fine on this same machine.

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I found another thread here about OpenGL causing performance issues in 1.9. I had OpenGL enabled, and when I disable it, crop works fine. Again, I had OpenGL active before 1.9, and it was fine. Whatever the issue is with OpenGL in Affinity Photo it is caused by 1.9 update.

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@dev4press, it's actually OpenCL - that is the interface to enable 'computing' to be carried out using the graphics processor.  OpenGL is something else.

There is another thread (albeit around a Lenovo Ideapad 110) involving Intel integrated graphics and Intel's OpenCL implementation:

The general consensus seems to be to turn off hardware acceleration until the OpenCL interface issues are sorted.  And in case you think it's only limited to Intel, there are big problems with AMD graphics cards too, such that Affinity have disabled HA for all higher level AMD cards.  Sorry that it's not much help, but you should be able to carry on using Affinity Photo with all its features, just without HA for the time being.

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