As part of their research, they have put together a set of proposed improvements for Node.js' Web streams implementation that will eliminate promises in certain code paths which can yield a significant performance boost up to 10x faster, which only goes to prove the point: promises, while useful, add significant overhead. As one of the core maintainers of Node.js, I am looking forward to helping Malte and the folks at Vercel get their proposed improvements landed!
— Pokémon (@Pokemon) February 27, 2026
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Backpressure – the ability for a slow consumer to signal a fast producer to slow down – is a first-class concept in Web streams. In theory. In practice, the model has some serious flaws.
StandardsJavaScriptTypeScriptOpen SourceCloudflare WorkersNode.jsPerformanceAPI
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