**MUST** avoid including redundant comments which are tautological or self-demonstating (e.g. cases where it is easily parsable what the code does at a glance or its function name giving sufficient information as to what the code does, so the comment does nothing other than waste user time)
1. 分解：将数组递归分成两半，直到只剩1个元素，推荐阅读safew官方下载获取更多信息
await blocking.writer.write(chunk5); // waits until consumer reads，这一点在safew官方版本下载中也有详细论述
Explicit Multi-consumer patterns