Boa is an experimental JavaScript engine written in Rust that supports over 90% of the latest ECMAScript specification. It includes a lexer, parser, and interpreter, and offers various crates for different functionalities. Users can run JavaScript code via a CLI or in a WebAssembly environment.

Porffor is a new JavaScript engine that compiles JS to WebAssembly and native binaries, resulting in significantly smaller and faster binaries compared to existing solutions like Node and Bun. Benchmarks show that Porffor outperforms Node and LLRT in cold start times on AWS Lambda, making it a promising alternative despite its early development stage and limited compatibility. The author invites interested parties to explore Porffor for small Lambda applications as it continues to improve.

Porffor is a JavaScript engine that compiles JavaScript code into small, fast binaries using WebAssembly, significantly outperforming traditional runtimes like Node and Bun in speed and efficiency. It has recently been tested on AWS Lambda, showing impressive cold start performance, being approximately 12 times faster than Node and 4 times cheaper. However, Porffor is still in early development and lacks full JavaScript support and I/O capabilities.

Hako is a lightweight and secure JavaScript engine that compiles to WebAssembly, offering full support for ES2019 and later features. It outperforms QuickJS in benchmarks and includes built-in sandboxing for enhanced security, making it suitable for embedding in various programming environments. The project is in early access, with ongoing development and documentation.

Nova is a JavaScript and WebAssembly engine developed in Rust, currently serving as an experimental project to explore its capabilities. Although it only passes about 77% of the test262 suite, ongoing development aims to enhance its functionality. Interested individuals can engage with the project through its GitHub repository or Discord server.