This pattern has caused connection pool exhaustion in Node.js applications using undici (the fetch() implementation built into Node.js), and similar issues have appeared in other runtimes. The stream holds a reference to the underlying connection, and without explicit consumption or cancellation, the connection may linger until garbage collection – which may not happen soon enough under load.
extract2, when we know the final size of the slice, we do one heap
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（四）围攻裁判员、运动员或者其他工作人员的；