I run blender on an Imac with 16 gig. This is a horrible machine to try to do 3d modeling… Anyway, I was playing around with the performance section of the render properties panel. I rendered a very simple 1080p scene using Blender internal.
Using the default s in the performance section:
Auto Detect threads
tile size 64x64
The scene took 16.91 to render.
I played around with the tile size and eventual figured out that 256x256 was the optimal setting for this scene.
The resulting render time was 7.72 (Less than half the time!)
I then started playing with the threads and after several tries I came up with fixed 20 threads gave me the best times.
The resulting render time was 6.21
The moral of the story is that from now on, when doing one of those “all weekend render sessions” I will take the few minutes I need to change the settings and see what gives me the best performance. If I can cut my render time by more than 60% for a project, it is well worth the time!
I have had similar time savings on my PC running windows XP with 2 gig.