Severe performance hit when switching from 2.36 to 2.4x

This may be a question better directed to the Gentoo forums, but thus far I have been unable to find any helpful information on the Gentoo forums. Ever since I upgraded to blender 2.4x (currently 2.42) on Gentoo, my render times have slowed by about 10 times. This has been uniform on all 5 of the Gentoo machines I have used. Every one of them had (relatively) excellent render times with Blender 2.36, and all of them have horrible render times in 2.4x. From what I understand, rendering is totally unrelated to the video card, so it shouldn’t be my GL settings or the like. What user-editable settings exist that could possibly be causing this HUGE hit to rendering performance?

I think it has to do with the use of “buckets” while rendering.
Try setting x and y parts to 1 (single cpu) or 2 (dual core or hyperthreading) or higher if using more than 2 cpu’s. If I am not mistaken, the higher values are for networked rendering. :slight_smile:

Oh yeah, if dual core or hyperthreading or using multiple cpu’s, turn on the threads button.

That fixed it! Back to normal, thanks :slight_smile: