P: Curves lag since version 21.1

I'll give that a shot. I just went through patching all my drivers to make sure they weren't at fault; and tried 2019 and that also has the lag - so now I don't know if I'm miss-remembering the version it was smooth with - or it could be some Windows update-related issue.

I've got a MBP too, which displays the same canvas update lag but interestingly doesn't suffer from the input-handle movement lag (which makes the windows iteration of it especially frustrating). Neither's exactly great though!

Hi Matthew,
so you also confirm that the latest update has not resolved?
But how come they didn't notice the problem?

I stayed at 21.0.3 and the curves work well ... not like 2019 🙂

Have this too in 21.2.0.

It's on pretty much all adjustment layers, but most noticeable on Curves (possibly because you're making such fine movements with it). Used to effectively live update, now it's a second or so before the screen updates.

Interestingly the latest Camera Raw's curve interface feels like Photoshop's used to - silky smooth.

I don't think I'm performance gated... Have a large NVME system disk and large NVME scratch disk plus backup vanilla SSDs, 64GB RAM, an i9-900K and a Quadro RTX4000. Working on large, multi-layered images in 16-bit but the lag is even apparent on tiny 8-bit canvases. And going back a few versions, this wasn't apparent.

Are there some news? ... version 21.1.3 always has the same problem? Thanks

Is there any timeframe for a fix? I accidentally updated one of my workstations and rolling the other one back to 21.0 was such a pain, I'm hoping I can skip that and hold out for a fix. I spend hours matching colors every day and having a "blind" targeted adjustment tool is like having one arm in a sling. Even the info panel can't keep up.

Thanks Jeff!

I've asked engineering to take look.

I can confirm what you are seeing on my Windows 10 system with Nvidia Quadro P2000 GPU and 32 GB system memory (60% allocated to PS).

That's certainly likely, given the complexity... Most of my use is photo editing, so I don't run into some of the things more advanced users encounter...

Thanks, but I allocated more RAM and nothing changed.
Do your curves refresh smoothly?