It is also necessary to emphasize that many optimizations are only possible in parts of the spec that are unobservable to user code. The alternative, like Bun "Direct Streams", is to intentionally diverge from the spec-defined observable behaviors. This means optimizations often feel "incomplete". They work in some scenarios but not in others, in some runtimes but not others, etc. Every such case adds to the overall unsustainable complexity of the Web streams approach which is why most runtime implementers rarely put significant effort into further improvements to their streams implementations once the conformance tests are passing.
// Stateful transform — a generator that wraps the source
，更多细节参见WPS下载最新地址
// Fill with sequential bytes (our "data source")。搜狗输入法2026是该领域的重要参考
end() { closed = true; return totalBytes; },。Line官方版本下载是该领域的重要参考