[Bf-cycles] 2.64 significantly slower than 2.63?

[Cal McGaugh]

Hi,

this is an update to my previous email (below)

Has anyone noticed that 2.64 64bit GPU renders are slower than 2.63 64bit GPU?
Or is it some quirk on of my system?

EVGA GTX460 2GB (with latest driver)

Compared 3 builds/releases of Blender 2.64 using these benchmarks:

#1
  http://blenderartists.org/forum/showthread.php?239480-2-61-Cycles-render-benchmark&highlight=benchmark

#2  http://benchmark.cd3dtech.com/Benchmark/benchmark.html



2.63a r46461:46487M                     6:22            1:13

"Fastest CUDA" r51640                   8:15            1:37

Blender.org 2.64a  r51232              8:08            2:01

Buildbot.com r51641                        8:16            1:37

Note,  rendered 1x1 tiles per Adriano Oliveira's suggestion for faster
time......8x8 rendered in 14min 22sec.

Please let me know if this is a known issue, or if you need me to test more
builds/releases.

Thanks,
Cal  McGaugh

www.blenderportal.com








---------- Original Message ----------
From: Cal McGaugh <cal at cal3d.com>
To: bf-cycles at blender.org
Date: October 23, 2012 at 6:18 PM
Subject: Cycles 2.64 GPU 2X slower???
Hi,


using this benchmark <http://benchmark.cd3dtech.com/Benchmark/benchmark.html> ,
  Cycles 2.64 r51291-mingw64  renders in 14min 22sec

Cycles 2.64 2.64.5 "Fastest build (All CUDA kernels)  renders in 14min 58sec.

But 2.63 r46461:46487M renders in 6min 22sec .........what's up???

Just thought someone should know about it.

Cheers,
Cal

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