Nova JavaScript Engine

In plain words

Nova is a JavaScript engine built on data-oriented design principles that organize heap data into type-specific vectors. Numbers, strings, objects, and other data types are stored separately, with references using type-discriminated indexes. This architectural approach differs significantly from traditional JavaScript engines, potentially offering different performance characteristics. The engine is available as an open-source project for developers interested in alternative JavaScript runtime implementations.

written from the facts on this page · September 2026

From the sources

JS engine lolz. Contribute to trynova/nova development by creating an account on GitHub.

Nova is a JavaScript engine focused on being lightweight, modular, and easy to embed. The engine's architecture is built close to the ECMAScript specification in structure with the implementation relying on idiomatic Rust and data-oriented design over traditional JavaScript engine building strategies. Interpreter performance is also a goal, but not yet a high priority. The engine is exposed as a library with an API for implementation in Rust projects which themselves must serve as a runtime for JavaScript code. The execution model is greatly inspired by Kiesel and LibJS . The project's website can be found at trynova.dev , where we blog about the project's progress and where we track our…from github.com

In the maker’s words, at launch

We're building a different kind of JavaScript engine, based on data-oriented design and willingness to try something quite out of left field. This is most concretely visible in our major architectural choices: 1. All data allocated on the JavaScript heap is placed into a type-specific vector. Numbers go into the…

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