Node.js 22 adds support for synchronous require of JavaScript module graphs, similar to dynamic import() but run synchronously. The goal is to eventually enable require(esm) by default.
In Node.js 22, Websocket support remains experimental but is now the default. Developers no longer need to use a flag to activate it.
Node.js 22 updates the V8 JavaScript engine to version 12.4, using the Maglev JIT compiler. Performance enhancements include WebAssembly Garbage Collection and increased High Water Mark for streams.
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