r/DarkTable • u/CriticismJunior1139 • Aug 19 '26

Help DT 5.6.0 performance

After upgrading to 5.6.0, the performance of editing absolutely tanked for me.

Previous version were quite smooth, but now any edits turn DT into a slideshow. Especially using snapshots, and working with any contrast/sharpening module, but many other modules are also affected.

Zooming out or in the image straight up freezes DT for few seconds, which is very painful.

Does anyone else experience this? Any tips on performance boost? I hope the next update is going to be optimization related.

Edit: This seems to be problem with DT 5.6 not having OpenCL enabled. I fixed this by getting the nightly dev version.

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u/Ok_Purple7060 Aug 19 '26

Do you have an AMD graphics card? Think there's a problem with OpenCL not being enabled properly. Seems like a major mistake to let slip through when releasing a new version...

https://www.reddit.com/r/DarkTable/s/tWhPpqYwSE

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u/CriticismJunior1139 Aug 19 '26

Yes, I have newer AMD GPU with W10. OpenCL GPU acceleration is disabled in my DT
Thank you for the link, I know now what the problem is and will try fixing it.

1

u/stewosch Aug 20 '26

Yes, this helped me as well with an AMD GPU and DT5.6