< Features
Replace libjpeg by libjpeg-turbo
Summary
libjpeg-turbo is fork of the original libjpeg project. It contains numerous performance related enhancements and is at least twice faster in JPEG compression/decompression than original libjpeg on platforms with MMX/SSE instruction set. It has same API/ABI like original libjpeg and also runs on non-SSE platforms where is around 25% faster.
Owner
- Name: Adam Tkac
Current status
- Targeted release: Fedora 14
- Last updated: 2010-06-04
- Percentage of completion: 60%
Detailed Description
Everything is written in summary.
Benefit to Fedora
Much faster JPEG compression/decompression library. JPEG codec is widely used and it is good to speed up core library which implements it. Additionally, libjpeg-turbo is developed in more open-source manner than original libjpeg.
Scope
libjpeg-turbo has same API/ABI as libjpeg so no package needs to be rebuilt
How To Test
You can use any program which uses libjpeg-turbo code. You should try to perform JPEG compression/decompression to and check if you don't see artefacts. You can also compare speed of the libjpeg-turbo against libjpeg, you should be able to visually check that libjpeg-turbo is really faster.
User Experience
A lot faster JPEG compression/decompression
Dependencies
462 packages (repoquery --alldeps --whatrequires libjpeg |wc -l) but no rebuild is needed due API/ABI compatibility
Contingency Plan
Revert to libjpeg when libjpeg-turbo hits some serious problems.
Documentation
- http://sourceforge.net/projects/libjpeg-turbo
- check http://atkac.fedorapeople.org/libjpeg-turbo for SRPM
Release Notes
libjpeg library has been replaced by libjpeg-turbo library which has same API/ABI but is at least twice faster on all primary architectures and about 25% faster on secondary architectures