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 4.8.0 vs. LLVM Clang 3.3 Compiler Performance Three-Way

Michael Larabel

Published on 25 May 2013
Written by Michael Larabel
Page 2 of 4 - 17 Comments

The Core i7 3960X Extreme Edition results for HMMer weren't too interesting, but for the AMD FX-8350 and Core i3 3217U systems they were much faster with LLVM Clang 3.3 over the stable 3.2 release. The LLVM Clang 3.3 performance improvements were enough to make Clang faster than GCC 4.8 on the FX-8350 CPU and competitive with GCC on the Core i3 Ivy Bridge Ultrabook.

The findings with MAFFT were similar to that of the HMMer results where the AMD FX-8350 and Core i3 systems saw nice performance improvements when upgrading LLVM/Clang. Partially responsible for the performance improvements is the LLVM Loop Vectorizer being enabled by default for the -O3 optimization level. LLVM 3.3 also introduces the LLVM SLP Vectorizer, but that isn't currently enabled by default.

GCC 4.8 still has a slight edge over Clang with the BLAKE2 test for all three AMD/Intel CPUs.

GCC 4.8 has the heavy advantage for GraphicsMagick since LLVM 3.3 still lacks support for OpenMP.

Latest Linux News
  1. Fedora 22 Is Being Released Next Tuesday
  2. OpenWRT 15.05 Preparing Improved Security & Better Networking
  3. Using The New LLVM/Clang OpenMP Support
  4. Zapcc Claims To Be A "Much Faster C++ Compiler"
  5. Godot 1.1 Engine Release Brings New 2D Engine
  6. Intel VA-API Driver 1.6 Is Coming
  7. Canonical Is Reportedly Considering An IPO
  8. GNOME 3.18 - GTK3 Now Supports RandR 1.5
  9. Fedora 22 Risks Being Delayed Beyond Next Week
  10. Systemd 220 Has Finally Been Released
  11. LibreOffice 5.0 Beta 1 Released
  12. Allwinner Publishes New CedarX Open-Source Code
Latest Articles & Reviews
  1. Btrfs RAID 0/1 Benchmarks On The Linux 4.1 Kernel
  2. The State Of Various Firefox Features
  3. Intel Iris Graphics Performance With Mesa 10.6
  4. Fedora Workstation 22 Is Looking Great, Running Fantastic
Most Viewed News This Week
  1. The Linux 4.0 Kernel Currently Has An EXT4 Corruption Issue
  2. Rust 1.0 Language Officially Released
  3. AMDGPU Open-Source Driver Code Continues Maturing
  4. Oculus Rift Suspends Linux Development To Focus On Windows
  5. Wine 1.7.43 Works On Desktop Shell Window Support
  6. Spec Ops: The Line Is The Latest Linux Shooter
  7. Microsoft Open-Sources The Windows Communication Foundation
  8. RadeonSI Gallium3D Driver To Be Enabled For Android