Latest update...

[jan rufelt]

Latest update to Photoshop made it impossible to use intensity/contrast! Very, very slow. Does not help to use  "use older". 

Imac Retina 5K, 27, 2019. Intel core i9, 32 GB  2667 DDR4 RAM. Radeon PRO 580X 8GB.

[c.pfaffenbichler]

What have you done for trouble-shooting so far? 

Restoring Preferences after making sure all customized presets like Actions, Patterns, Brushes etc. have been saved might be a good starting point:

https://helpx.adobe.com/photoshop/kb/basic-trouble-shooting-steps.html

Does turning off »Use Graphics Processor« in the Performance Preferences (Photoshop > Preferences > Performance > Graphic Processor Settings) and restarting Photoshop have any bearing on the issue? 

[jfishdesign]

Welp, restoring Preferences seems to have fixed the issue for me. Thanks!

[jan rufelt]

Hey!

Great! Restoring the preferences was enough to fix the problem!

Thank you so much!

/Jan

[PECourtejoie]

Hello, the adjustment layer, or the regular one?

Ok, indeed, I got Ps to freeze by using the image>adjustment,and not the adjustment layer. 

[jan rufelt]

To me it didn't matter if it was an adjustment layer or the picture itself. Could be a small or big file, the tool was just very slow.

Anyway the problem is solved by restoring preferences!

/Jan

[PECourtejoie]

Hi, did you try to restart Photoshop? it seemed to have fixed the issue for me.

[jan rufelt]

🙂 Nice!

For me the problem was solved by restoring preferences!

/Jan

[Earth Oliver]

another user reports that disabling the Rulers can improve performance.

[davescm]

Hi

Workarounds include :

a. Disabling rulers.

Or

b. Moving the adjustment dialogue outside the Photoshop window.

Or

c. Using adjustment layers. Actually the last one, adjustment layers, is more of a preferred way of working than a workaround, due to its non-destructive, editable, functionality. No good for alpha channel adjustments though.

Dave

[jan rufelt]

Hi!

Disabling rulers did the trick! Thank you very much!!

[jan rufelt]

This helped me to! (I'm a Mac OS user)

Thank you!

/Jan