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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.

Just-in-time compilation engines

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.

Runtime interpreter engines

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

See also


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