You might assume this pattern is inherent to streaming. It isn't. The reader acquisition, the lock management, and the { value, done } protocol are all just design choices, not requirements. They are artifacts of how and when the Web streams spec was written. Async iteration exists precisely to handle sequences that arrive over time, but async iteration did not yet exist when the streams specification was written. The complexity here is pure API overhead, not fundamental necessity.
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，更多细节参见搜狗输入法2026
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// ⚠️ 易错点3：此处返回n而非0（完全有序无需排序，长度为0）。关于这个话题，91视频提供了深入分析