NVIDIA Tegra K1 GCC Clang Compilers
GCC 4.8.2 vs. Clang 3.4 on NVIDIA's Tegra K1 SoC via the NVIDIA Jetson TK1 ARM quad-core Cortex-A15 development board. Benchmarks by Michael Larabel for a future article on Phoronix.com.


Clang 3.4: 

	Processor: ARMv7 rev 3 @ 2.32GHz (4 Cores), Motherboard: laguna, Memory: 2048MB, Disk: 16GB SEM16G, Graphics: GK20A/AXI, Network: Realtek RTL8111/8168/8411

	OS: Ubuntu 14.04, Kernel: 3.10.24-g6a2d13a (armv7l), Desktop: Unity 7.2.0, Display Server: X Server 1.15.1, Display Driver: NVIDIA 19.2, OpenGL: 4.3.0, Compiler: Clang 3.4-1ubuntu3, File-System: ext4, Screen Resolution: 1920x1080

GCC 4.8.2: 

	Processor: ARMv7 rev 3 @ 2.32GHz (4 Cores), Motherboard: laguna, Memory: 2048MB, Disk: 16GB SEM16G, Graphics: GK20A/AXI, Network: Realtek RTL8111/8168/8411

	OS: Ubuntu 14.04, Kernel: 3.10.24-g6a2d13a (armv7l), Desktop: Unity 7.2.0, Display Server: X Server 1.15.1, Display Driver: NVIDIA 19.2, OpenGL: 4.3.0, Compiler: GCC 4.8.2 + Clang 3.4-1ubuntu3, File-System: ext4, Screen Resolution: 1920x1080


SciMark 2.0
Computational Test: Composite
Mflops > Higher Is Better
Clang 3.4 . 393.13 |===========================================================
GCC 4.8.2 . 351.71 |=====================================================


SciMark 2.0
Computational Test: Monte Carlo
Mflops > Higher Is Better
Clang 3.4 . 275.42 |===========================================================
GCC 4.8.2 . 231.91 |==================================================


SciMark 2.0
Computational Test: Fast Fourier Transform
Mflops > Higher Is Better
Clang 3.4 . 58.04 |============================================================
GCC 4.8.2 . 45.98 |================================================


SciMark 2.0
Computational Test: Sparse Matrix Multiply
Mflops > Higher Is Better
Clang 3.4 . 369.93 |==========================================================
GCC 4.8.2 . 374.74 |===========================================================


SciMark 2.0
Computational Test: Dense LU Matrix Factorization
Mflops > Higher Is Better
Clang 3.4 . 624.29 |===========================================================
GCC 4.8.2 . 625.32 |===========================================================


SciMark 2.0
Computational Test: Jacobi Successive Over-Relaxation
Mflops > Higher Is Better
Clang 3.4 . 637.99 |===========================================================
GCC 4.8.2 . 480.59 |============================================


GraphicsMagick 1.3.19
Operation: Blur
Iterations Per Minute > Higher Is Better
Clang 3.4 . 30 |=======================================
GCC 4.8.2 . 48 |===============================================================


GraphicsMagick 1.3.19
Operation: Sharpen
Iterations Per Minute > Higher Is Better
Clang 3.4 . 13 |==================
GCC 4.8.2 . 46 |===============================================================


GraphicsMagick 1.3.19
Operation: Resizing
Iterations Per Minute > Higher Is Better
Clang 3.4 . 29 |============================
GCC 4.8.2 . 65 |===============================================================


GraphicsMagick 1.3.19
Operation: HWB Color Space
Iterations Per Minute > Higher Is Better
Clang 3.4 . 55 |================================================
GCC 4.8.2 . 72 |===============================================================


GraphicsMagick 1.3.19
Operation: Local Adaptive Thresholding
Iterations Per Minute > Higher Is Better
Clang 3.4 . 30 |=====================================================
GCC 4.8.2 . 36 |===============================================================


Himeno Benchmark 3.0
Poisson Pressure Solver
MFLOPS > Higher Is Better
Clang 3.4 . 224.67 |===========================================================
GCC 4.8.2 . 142.37 |=====================================


Timed Apache Compilation 2.4.7
Time To Compile
Seconds < Lower Is Better
Clang 3.4 . 83.68  |=======================================
GCC 4.8.2 . 128.21 |===========================================================


Timed ImageMagick Compilation 6.8.1-10
Time To Compile
Seconds < Lower Is Better
Clang 3.4 . 146.80 |=========================
GCC 4.8.2 . 346.30 |===========================================================


C-Ray 1.1
Total Time
Seconds < Lower Is Better
Clang 3.4 . 207.48 |===========================================================
GCC 4.8.2 . 86.01  |========================


FLAC Audio Encoding 1.3.0
WAV To FLAC
Seconds < Lower Is Better
Clang 3.4 . 17.93 |============================================================
GCC 4.8.2 . 15.16 |===================================================


LAME MP3 Encoding 3.99.3
WAV To MP3
Seconds < Lower Is Better
Clang 3.4 . 37.99 |============================================================
GCC 4.8.2 . 36.63 |==========================================================


Apache Benchmark 2.4.7
Static Web Page Serving
Requests Per Second > Higher Is Better
Clang 3.4 . 4565.50 |==========================================================
GCC 4.8.2 . 4601.34 |==========================================================