More Darktable Benchmark Data
Intel Core i5-6600K testing with a MSI Z170A GAMING PRO (MS-7984) v1.0 and Intel HD 530 (Skylake GT2) 3072MB on Ubuntu 16.10 via the Phoronix Test Suite.


Intel Core i7 6800K: 

	Processor: Intel Core i7-6800K @ 3.80GHz (12 Cores), Motherboard: MSI X99A WORKSTATION (MS-7A54) v1.0, Chipset: Intel Xeon E7 v4/Xeon, Memory: 16384MB, Disk: 120GB Samsung SSD 850 + 4 x 120GB TOSHIBA-TR150, Graphics: NVIDIA GeForce GTX TITAN X 12288MB (1001/3505MHz), Audio: Realtek ALC1150, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.8.0-27-generic (x86_64), Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: NVIDIA 375.20, OpenGL: 4.5.0, Vulkan: 1.0.24, Compiler: GCC 6.2.0 20161005, File-System: ext4, Screen Resolution: 2560x1440

GeForce GTX TITAN X: 

	Processor: Intel Core i7-6800K @ 3.80GHz (12 Cores), Motherboard: MSI X99A WORKSTATION (MS-7A54) v1.0, Chipset: Intel Xeon E7 v4/Xeon, Memory: 16384MB, Disk: 120GB Samsung SSD 850 + 4 x 120GB TOSHIBA-TR150, Graphics: NVIDIA GeForce GTX TITAN X 12288MB (1001/3505MHz), Audio: Realtek ALC1150, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.8.0-27-generic (x86_64), Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: NVIDIA 375.20, OpenGL: 4.5.0, Vulkan: 1.0.24, Compiler: GCC 6.2.0 20161005, File-System: ext4, Screen Resolution: 2560x1440

Intel Core i5 6600K: 

	Processor: Intel Core i5-6600K @ 3.90GHz (4 Cores), Motherboard: MSI Z170A GAMING PRO (MS-7984) v1.0, Chipset: Intel Skylake, Memory: 15360MB, Disk: 256GB TS256GSSD370S, Graphics: Intel HD 530 (Skylake GT2) 3072MB, Audio: Realtek ALC1150, Monitor: DELL P2415Q, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.8.0-27-generic (x86_64), Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: modesetting 1.18.4, OpenGL: 4.5 Mesa 13.1.0-devel- padoka PPA, Vulkan: 1.0.21, Compiler: GCC 6.2.0 20161005 + LLVM 4.0.0, File-System: ext4, Screen Resolution: 3840x2160


Darktable 2.2.0~rc1
Test: Server Room - Acceleration: CPU-only
Seconds < Lower Is Better
Intel Core i7 6800K . 7.48  |================
Intel Core i5 6600K . 23.29 |==================================================


Darktable 2.2.0~rc1
Test: Boat - Acceleration: CPU-only
Seconds < Lower Is Better
Intel Core i7 6800K . 14.97 |===================
Intel Core i5 6600K . 38.80 |==================================================


Darktable 2.2.0~rc1
Test: Masskrug - Acceleration: CPU-only
Seconds < Lower Is Better
Intel Core i7 6800K . 9.16  |==================
Intel Core i5 6600K . 25.83 |==================================================


Darktable 2.2.0~rc1
Test: Boat - Acceleration: OpenCL
Seconds < Lower Is Better
GeForce GTX TITAN X . 3.30 |===================================================


Darktable 2.2.0~rc1
Test: Masskrug - Acceleration: OpenCL
Seconds < Lower Is Better
GeForce GTX TITAN X . 5.15 |===================================================


Darktable 2.2.0~rc1
Test: Server Room - Acceleration: OpenCL
Seconds < Lower Is Better
GeForce GTX TITAN X . 0.98 |===================================================