V8 (JavaScript engine)
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| Developer(s) | |
|---|---|
| Stable release | 3.26.6[1] / April 4, 2014 |
| Development status | Active |
| Written in | C++,[2] JavaScript[2] |
| Operating system | Cross-platform |
| Platform | IA-32, x86-64, ARM[3] |
| Type | JavaScript engine |
| License | BSD |
| Website | code.google.com/p/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[update], 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 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[edit]
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]
Usage[edit]
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[edit]
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- JavaScriptCore
- SpiderMonkey
- ECMAScript
- Just-in-time compilation
- List of ECMAScript engines
- Dart (programming language)
- Blink (layout engine)
References[edit]
- ^ "V8 JavaScript Engine: Changelog". Google Code. Google. 19 Feb 2014. Retrieved 21 Feb 2014.
- ^ a b "V8 JavaScript Engine". Google Code.
- ^ a b "Introduction - Chrome V8". Google Developers.
- ^ Lenssen, Philipp (1 September 2008). "Google on Google Chrome - comic book". Google Blogoscoped. Google. Retrieved 17 August 2010.
- ^ Minto, Rob (27 March 2009). "The genius behind Google’s web browser". Financial Times. Retrieved 17 August 2010.
- ^ "V8 Changelog v3.8.2". Google. Retrieved 23 October 2012.
- ^ "A game changer for interactive performance". Chromium Blog. Google. Retrieved 1 May 2012.
- ^ "V8 JavaScript Engine: License". Google Code. Google. Retrieved 17 August 2010.
- ^ "A New Crankshaft for V8". Chromium Blog. Google. 7 December 2010. Retrieved 22 April 2011.
- ^ Jolie O'Dell (March 10, 2011). "Why Everyone Is Talking About Node". Mashable.
External links[edit]
- 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
- V8.NET
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