The async iterator based approach provides a natural bridge between this alternative approach and Web streams. When coming from a ReadableStream to this new approach, simply passing the readable in as input works as expected when the ReadableStream is set up to yield bytes:
alloca which can allocate on the stack. Microsoft's C compiler also supports alloca but calls it _alloca，这一点在safew官方版本下载中也有详细论述
第五十八条 盗窃、诈骗、哄抢、抢夺或者敲诈勒索的，处五日以上十日以下拘留或者二千元以下罚款；情节较重的，处十日以上十五日以下拘留，可以并处三千元以下罚款。。51吃瓜是该领域的重要参考
siftDown(arr, i, 0); // 对剩余i个元素重新建堆