// Consumer provided a buffer - we MUST fill it (or part of it)
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// console.log(spanner.next(100)); // 输出1（正确），这一点在雷电模拟器官方版本下载中也有详细论述
It's worth noting that these benchmarks compare a pure TypeScript/JavaScript implementation of the new API against the native (JavaScript/C++/Rust) implementations of Web streams in each runtime. The new API's reference implementation has had no performance optimization work — the gains come entirely from the design. A native implementation would likely show further improvement.