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.org

GCC 4.8 Compiler - Is It Faster Yet?

Compiler

Published on 24 June 2012 02:13 PM EDT
Written by Michael Larabel in Compiler
Comment On This Article

GCC 4.7 was released a few months back, but have changes in the trunk code-base -- for what will eventually become GCC 4.8 -- resulted in any major performance changes yet?

GCC 4.8 will likely not be released until early 2013, but it's worth seeing if there's any performance changes early on in case the change is a regression or other issue. Plus GCC 4.8 will be competing with what will likely be LLVM/Clang 3.2 or LLVM/Clang 3.3.

The GCC 4.8 changes page at this point only mentions a new partial redundancy elimination (PRE) optimization and a new x86_64 option concerning stack alignment. The partial redundancy elimination optimization is exposed via the -ftree-partial-pre compiker switch or is also enabled at the -O3 optimization level where it's more aggressive. Many more changes and new features will be documented in the months leading up to the GCC 4.8.0 general availability.

GNU Compiler Collection 4.8 is also the release where developers hope to switch to C++ mode by default. We might also see the GNU D language compiler merged for this next release.

Anyhow, up today are just some simple benchmarks from the Intel Core i7 3770K "Ivy Bridge" system running some different Fortran/C/C++ tests while the CFLAGS/CXXFLAGS were set to "-O3 -march=native." The GCC 4.8.0 20120617 snapshot was compared to GCC 4.6.3 and GCC 4.7.1. Full details are available on OpenBenchmarking.org.

Continue exploring the results at OpenBenchmarking.org.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. Intel Launches The Core i7 5960X, Mighty Powerful Haswell-E CPUs
  2. AMD Radeon R9 290: Gallium3D vs. Catalyst Drivers
  3. AMD Radeon R9 290 Open-Source Driver Works, But Has A Ways To Go
  4. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
Latest Linux Articles
  1. The Fastest NVIDIA GPUs For Open-Source Nouveau With Steam Linux Gaming
  2. Testing For The Latest Linux Kernel Power Regression
  3. The Most Energy Efficient Radeon GPU For AMD Linux Gaming
  4. 20-Way Radeon Comparison With Open-Source Graphics For Steam On Linux Gaming
Latest Linux News
  1. Intel Beignet Is Working Out Surprisingly Well For OpenCL On Linux
  2. Coreboot Adds Lenovo X220 With Native Sandy Bridge Support
  3. Canonical Has Yet To Land X.Org Server 1.16 For Ubuntu 14.10
  4. Imagination Launches A MIPS Development Board
  5. Getting Involved With The New Raspberry Pi Graphics Driver
  6. A New AMD Catalyst Linux Driver Unofficially Surfaces
  7. LibreOffice Ported To 64-bit ARM (AArch64)
  8. Enlightenment E19 RC3 Shows Off The New Wayland Compositor
  9. Metro Redux Is Going To Require OpenGL 4.x On Linux
  10. Jailhouse v0.1 Released As A Basic Hypervisor For Linux
Latest Forum Discussions
  1. Btrfs Gets Talked Up, Googler Encourages You To Try Btrfs
  2. Updated graphics drivers for Ubuntu 12.04 Precise LTS
  3. Catalyst 14.201.1008
  4. It's Now Possible To Play Netflix Natively On Linux Without Wine Plug-Ins
  5. Users defect to Linux as OpenBSD removes Lynx from base system
  6. Updated and Optimized Ubuntu Free Graphics Drivers
  7. Canonical Joined The Khronos Group To Help Mir/Wayland Drivers
  8. Radeon HD5670 and Ubuntu 14.04