If someone reading this has access to the source code, can they please look for updates in those sections of the code for 13.0.1 version. I'd be willing to bet big bucks something was checked in that slowed down the performance of these tools.
When Photoshop behavior suddenly changes on you one of the first thing you should do is have Photoshop reset your Photoshop preference. This will fix any corrupted Photoshop preference file you may have and often returns Photoshop behavior back to normal.
I also did not understand what you wrote "using masks and the paintbrush to fill" I do not know about any paintbrush Fill option or what you trying to fill.
Thank you i'll give that a shot.
Also, when i said fill, i mean creating a layer mask and painting it back in with the paintbrush. Retouchers use that method often.
Brendan Stewart wrote:
i mean creating a layer mask and painting it back in with the paintbrush.
Yes that is normal. I have no problem with CS6, No lag or hesitation.
A tip for you if your creating the mask using a copy of a color channel. Set the brush blending mode to "Overlay" This will protect the mask Black and White areas. You will only be able yo paint in gray areas of the mask. When areas turn 0,0,0 Black or 255,255,255 White they become protected too. Use a Wacom tablet soft brush low opacity and many strokes