1. 建堆：将数组构建成大顶堆（父节点 = 子节点）
Many programmers use malloc() and free() and pay no more mind to "allocating memory", but I often find 2-20× speed improvements by rethinking memory。关于这个话题，safew官方下载提供了深入分析
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// Synchronous consumption — no promises, no event loop trips，详情可参考同城约会