WinterJS 1.0, a JavaScript web server written in Rust, has arrived from WebAssembly runtime provider Wasmer.
Unveiled March 11, WinterJS 1.0 is described by Wasmer as “the fastest JavaScript web server” and now supports Cloudflare applications and React Server Components. The WinterCG-compatible JavaScript runtime uses the SpiderMonkey JavaScript engine to execute JavaScript and Tokio to handle underlying HTTP requests and the JavaScript event loop. WinterCG, which stands for Web-interoperable Runtimes Community Group, is a W3C community group that provides a space for JavaScript runtimes to collaborate on API interoperability.
WinterJS can be compiled to WebAssembly and is runnable in the Wasmer Edge application deployment platform. WinterJS, Wasmer said, offers “blazing fast” speeds, Cloudflare API compatibility, and support for web frameworks such as Next.js. WinterJS 1.0 is able to handle 150,000 requests per second when executed natively, Wasmer said. WinterJS initially was unveiled in October 2023.