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

Warp: Facebook Open-Sources A Super Fast C/C++ Pre-Processor

Free Software

Published on 31 March 2014 11:51 AM EDT
Written by Michael Larabel in Free Software
20 Comments

Following Facebook's announcement of the Hack language and being one of the organizations backing the new WebScaleSQL, Facebook developers ended out last week by announcing Warp, their latest open-source contribution.

Warp is a C/C++ pre-processor that aims to be as fast as possible. The Warp pre-processor aims to be much faster than GCC's pre-processor. As explained in a new Facebook post:
Conventional wisdom has it that preprocessing time is a negligible part of building a C++ binary. C++ is notoriously difficult to parse, which means that C++ parsers tend to be large and slow compared to their counterparts for other languages. Code generation is also quite the time sink, especially if you're using optimizations. Finally, linking is a large serial step at the end of each build, and using the gold linker only helps so much. Therefore, it would seem that the lowly task of going through the included files and expanding macros would take a comparatively short time and be essentially impossible to improve upon.

Not so! Replacing gcc's preprocessor with warp has led to significant improvements of our end-to-end build times (including linking). Depending on a variety of circumstances, we measured debug build speed improvements ranging from 10% all the way to 40%, all in complex projects with massive codebases and many dependencies. That's not per-file speed, but rather global times measured for scenarios like "build after changing a header file."
The code to the Warp pre-processor has been open-sourced via GitHub. Those wishing to learn more about this C/C++ pre-processor can find details at length via the Facebook post announcement.

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 News
  1. LLVM 3.7 Is Planned For A Late August Release
  2. The OpenGL ES 3.1 Foundation Is Being Laid In Mesa
  3. There Are 140k Benchmark Results So Far On LinuxBenchmarking.com
  4. LLVM 3.6.1 Brings R600 & MIPS Fixes
  5. Friction Building Around An Ubuntu Community Council Decision
  6. Bye Bye Mandriva, She's Being Liquidated
  7. Fedora 22 Is Now Available
  8. Red Hat Has Another Developer Now Working On Nouveau
  9. Scribus 1.5 Released, Ported To Qt 5 With Big UI Overhaul Coming
  10. Mesa May Soon Enable OpenGL ES 1.x/2.x By Default
Latest Articles & Reviews
  1. Opening The Gates To Our Daily Open-Source Linux Benchmark Results
  2. The Latest Features For Linux Performance Management + Benchmark Monitoring
  3. Noctua NH-U12DX i4 + NF-F12
  4. Btrfs RAID 0/1 Benchmarks On The Linux 4.1 Kernel
Most Viewed News This Week
  1. The Linux 4.0 EXT4 RAID Corruption Bug Has Been Uncovered
  2. NVIDIA's Proprietary Driver Is Moving Closer With Kernel Mode-Setting
  3. Systemd 220 Has Finally Been Released
  4. Microsoft Open-Sources The Windows Communication Foundation
  5. Zapcc Claims To Be A "Much Faster C++ Compiler"
  6. LibreOffice 5.0 Beta 1 Released
  7. Another HTTPS Vulnerability Rattles The Internet
  8. LibreOffice 5.0 Open-Source Office Suite Has Been Branched