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

Qt Creator Can Be Compiled In Under 3 Minutes With Clang

Compiler

Published on 21 May 2014 08:07 AM EDT
Written by Michael Larabel in Compiler
13 Comments

One of LLVM's Clang compiler benefits that has long been trumpeted has been about its speedy compiler times in comparison to GCC. The latest results of using Clang with Qt Creator further reinforce the insanely fast compile times.

Jussi Pakkanen has been toying around with Clang static analysis and Clang compiling for Qt Creator. Long story short, he's very happy with his compile-time results. He's been playing around with building Qt Creator from scratch using the Meson automatic unity build generator and the Clang compiler, which has led him to having compile times under three minutes.

From a MacBook Pro with a solid-state drive and 16GB of memory (the CPU model wasn't mentioned in his post), a regular, unoptimized build takes almost 27 minutes for building Qt Creator... An optimized build meanwhile takes just over 32 minutes. This is with Qt Creator's default build system. However, with Jussi's changes and using Clang with the Unity build system, a build drops down to two and a half minutes for an unoptimized build or just over six minutes for an optimized build.

Those building Qt Creator and wishing to learn more can see this Qt mailing list post. The numbers jive with our findings too about fast compile times with Clang not only on x86 but also on ARM while the performance of the resulting binaries is mixed. It's common for many game developers and other commercial software studios to do their debug builds with LLVM/Clang for the expedited compile-times and static analysis while most of them are shipping their "release binaries" with GCC.

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 Articles & Reviews
  1. Samsung 850 EVO SSD Linux Benchmarks
  2. Kubuntu 15.04 Is Turning Out Quite Nice, Good Way To Try Out The Latest KDE
  3. 5-Way Linux Distribution Comparison On The Core i3 NUC
  4. OCZ ARC 100 Linux SSD Benchmarks
  5. Lenovo ThinkPad X1 Carbon Works Great As A Linux Ultrabook
  6. Transcend SSD370 256GB
Latest Linux News
  1. Linux 4.0 & LLVM vs. GCC Yielded Much Interest This Month
  2. XBMC/Kodi 15.0 Alpha 1 Released
  3. Xfce 4.12 Released After Nearly Three Years Of Work
  4. The Khronos Group Filed A Trademark On "Vulkan" API
  5. Mozilla Thunderbird Adoption Climbs, Thunderbird 38 In May
  6. The Most Popular Linux Benchmark Results On OpenBenchmarking.org
  7. Intel's Graphics Driver For Linux 4.1 Will Have More XenGT vGPU Support
  8. PlayOnLinux 4.2.6 Fixes A Number Of Issues
  9. Mesa 10.5-RC3 Now Available To Test Improved GPU Drivers
  10. New Specifications On The Alleged Ubuntu Tablet
Most Viewed News This Week
  1. Linux 4.0-RC1 Tagged, Linux 4.0 Will Bring Many Notable Improvements
  2. Screenshots Of The GNOME 3.16 Changes
  3. More Proof That Allwinner Is Violating The GPL
  4. Linux 4.0 Doesn't Have The Weirdest Codename
  5. The Tremendous Features Of Fedora 22
  6. Krita 2.9 Released, Their Biggest Release Ever
  7. A Single UEFI Executable With The Linux Kernel, Initrd & Command Line
  8. Canonical Comes Up With Its Own FUSE Filesystem For Linux Containers
%%CLICK_URL_UNESC%%