List of ECMAScript engines

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An ECMAScript engine is a program that executes source code written in a version of the ECMAScript language standard, for example, JavaScript.

These are new generation ECMAScript engines for web browsers, all implementing just-in-time compilation (JIT) or variations of that idea. The performance benefits for just-in-time compilation make it much more suitable for web applications written in JavaScript.

The following engines use runtime interpreters, which do not compile into native machine code and generally run more slowly.

  • Continuum:[7] A self-interpreter that supports recent iterations of the draft ECMAScript 6 specification.[8] Uniquely, the engine is implemented in ECMAScript 3, which makes it possible to run ES6 in browsers as old as IE6.[9]
  • Futhark: The ECMAScript engine of the Opera web browser versions 9.50 to 10.10.
  • InScript: An obsolete proprietary library used for iCab 2 and 3
  • JScript: The engine that is used in Internet Explorer for versions up to IE9, and one component of the Trident layout engine.
  • KJS: The engine used in Konqueror, and one component of KHTML, a predecessor to JavaScriptCore.
  • Linear B: The ECMAScript engine of the Opera web browser versions 7.0 to 9.50, exclusive.
  • Narcissus: JavaScript implemented in JavaScript (a meta-circular evaluator), intended to run in another JavaScript engine, of theoretical and educational nature only.
  • JS-Interpreter A lightweight JavaScript interpreter implemented in JavaScript with step-by-step execution.
  • QtScript: Originally developed by Trolltech, now owned by Digia. It provides QObject integration with JavaScriptCore.
  • Rhino: One of several JavaScript engines from Mozilla, using the Java platform.
  • YAJI: An ECMAScript engine[10] based on the FESI[11] implementation by Jean-Marc Lugrin in 1999, using the Java platform, currently being developed to support the latest standards (Spec 262, v5.1).[12]
  • Duktape: a small footprint, easily embeddable Ecmascript E5/E5.1 engine.[13]
  • The Kinoma Platform, an ECMAScript 5 runtime environment and framework

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