1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking Benchmarking Platform
Phoromatic Test Orchestration

GCC 4.6, LLVM/Clang 2.9, DragonEgg Five-System Benchmarks

Michael Larabel

Published on 28 March 2011
Written by Michael Larabel
Page 3 of 8 - 10 Comments

With C-Ray, one of the multi-threaded test favorites, using GCC 4.5.2 with DragonEgg and LLVM 2.9 produced the fastest binaries overall. The compiler difference for this multi-threaded ray-tracer under the Core i7 990X was not as huge as the slower systems, but the sweet spot did appear to be using GCC but with LLVM's optimizers and code-generators. Using Clang was also faster than GCC on the Intel Core i3 Sandy Bridge system, but slower on the two AMD computers and effectively the same with the Intel Core i7 990X and Intel Core 2 Duo E8400.

With Smallpt, another interesting test, the performance with Clang was horrible in comparison to the GCC compilers. In all tests, LLVM/Clang 2.9 was multiple times slower than GCC. It looks like Clang has issues with Smallpt when it comes to threading with Clang being twice as slow on the Intel Core 2 Duo, more than six times slower on the Intel Core i7 990X, nearly four times slower on the Quad-Core Opteron 2384, etc. In terms of comparing GCC 4.5.2, GCC 4.6.0, and DragonEgg, the performance was not that different between the three.

Latest Articles & Reviews
  1. Ubuntu 15.04 Offers Faster OpenGL For AMD Radeon GPUs On Open-Source
  2. Ubuntu 15.04 Brings Some Graphics Performance Improvements For Intel Haswell
  3. Sub-$20 802.11n USB WiFi Adapter That's Linux Friendly
  4. The Lenovo T450s Is Working Beautifully With Linux
  5. Linux 4.0 SSD EXT4 / Btrfs / XFS / F2FS Benchmarks
  6. Linux 4.0 Hard Drive Comparison With Six File-Systems
Latest Linux News
  1. Phoronix Server Migration
  2. GCC 5.2 Will Come In Two To Three Months
  3. AMD FP3 Motherboard Ported To Coreboot
  4. The Difference In Optimizations Between NIR & GLSL
  5. OpenMandriva Lx 3 Alpha: Adds UEFI Support, Defaults To LXQt
  6. Systemd Kills Off Shutdownd
  7. There's Now More Than 1,100 Games On Steam For Linux
  8. Btrfs In Linux 4.1 Has Fixes For File-Systems Of 20 Terabytes & Up
  9. Microsoft's CoreCLR Now Works On FreeBSD
  10. Unigine 2.0 Beta 2 Brings PBR, SSR, Kinect 2 Support
Most Viewed News This Week
  1. AMD Releases New "AMDGPU" Linux Kernel Driver & Mesa Support
  2. Ubuntu's Desktop-Next Switching From .DEBs To Snappy
  3. My Favorite Computer Desk Of The Past Decade For Less Than $100
  4. AMD Open-Sources "Addrlib" From Catalyst
  5. Library Operating System (LibOS) For Linux Still Being Pursued
  6. Debian 8.0 Jessie Is Ready For Release This Weekend
  7. GIMP's Porting To GTK3 Continues
  8. Features Thus Far For The Linux 4.1 Kernel