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V8 (JavaScript engine)


V8 (JavaScript engine)

V8 JavaScript Engine
Developer(s) Google
Stable release 3.29.59[1] / September 12, 2014 (2014-09-12)
Development status Active
Written in C++,[2] JavaScript[2]
Operating system Cross-platform
Platform IA-32, x86-64, ARM, MIPS[3]
Type JavaScript engine
License BSD
Website /v8/

The V8 JavaScript Engine is an open source JavaScript engine developed by Google for the Google Chrome web browser.[4] It has since seen use in many other projects. As of 2012, the head programmer is Lars Bak.[5] The first version of the V8 engine was released at the same time as the first version of Chrome, September 2, 2008.

V8 compiles JavaScript to native machine code (IA-32, x86-64, ARM, or MIPS ISAs)[3][6] before executing it, instead of more traditional techniques such as interpreting bytecode or compiling the whole program to machine code and executing it from a filesystem. The compiled code is additionally optimized (and re-optimized) dynamically at runtime, based on heuristics of the code's execution profile. Optimization techniques used include inlining, elision of expensive runtime properties, and inline caching, among many others.


  • Details 1
  • Usage 2
  • See also 3
  • References 4
  • External links 5


The garbage collector of V8 is a generational incremental collector.[7] The V8 assembler is based on the Strongtalk assembler.[8] On 7 December 2010, a new compiling infrastructure named Crankshaft was released, with speed improvements.[9]


V8 is intended to be used both in a browser (notably in Chrome and Chromium browsers) and as a standalone high-performance engine that can be integrated into independent projects, for example server-side JavaScript in Node.js,[10] or client side JavaScript in .NET/Mono using V8.NET.

See also


  1. ^ "V8 JavaScript Engine: Changelog".  
  2. ^ a b "V8 JavaScript Engine".  
  3. ^ a b "Introduction - Chrome V8". Google Developers. 
  4. ^ Lenssen, Philipp (1 September 2008). "Google on Google Chrome - comic book".  
  5. ^ Minto, Rob (27 March 2009). "The genius behind Google’s web browser".  
  6. ^ "V8 Changelog v3.8.2".  
  7. ^ "A game changer for interactive performance".  
  8. ^ "V8 JavaScript Engine: License".  
  9. ^ "A New Crankshaft for V8". Chromium Blog.  
  10. ^ Jolie O'Dell (March 10, 2011). "Why Everyone Is Talking About Node". Mashable. 

External links

  • Official website at Google Code
  • Google's Lars Bak V8: an open source JavaScript engine on YouTube
  • JSConf2012 Presentation on what is V8 able to do by Vyacheslav Egorov at jsconf
  • .NETV8

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