Bad performance with texture painting depending on multi-thread settings
Closed, InvalidPublic


System Information
Windows 6 64bit, Nvidia Quadro K4000

Blender Version
Broken: Newest official 2.78c (hash e92F235283)

Short description of error

The more I have threads enabled, the slower the texture painting performance is.
I get best performance when setting the threads manually to 1, from render settings.
Maximum I can have is 24 threads.

Exact steps for others to reproduce the error

Make a cube, unwrap, make new image (4096 x 4096), enter texture paint mode, start painting.
Go to render settings and experiment with different thread settings.

My other possibly related settings:
Window Draw Method: Triple Buffer
Region Overlap enabled


Dalai Felinto (dfelinto) triaged this task as Incomplete priority.May 22 2017, 3:38 PM

Please attach a sample file as per the bug tracker instructions.

More than a week without reply. Due to the policy of the tracker archiving for until required info/data are provided.