BYOB ends up being complex for both users and implementers, yet sees little adoption in practice. Most developers stick with default reads and accept the allocation overhead.
async transform(chunk, controller) {，这一点在夫子中也有详细论述
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But after years of building on Web streams – implementing them in both Node.js and Cloudflare Workers, debugging production issues for customers and runtimes, and helping developers work through far too many common pitfalls – I've come to believe that the standard API has fundamental usability and performance issues that cannot be fixed easily with incremental improvements alone. The problems aren't bugs; they're consequences of design decisions that may have made sense a decade ago, but don't align with how JavaScript developers write code today.