Promotion methods (Traffic sources)
Not all streaming workloads involve I/O. When your source is in-memory and your transforms are pure functions, async machinery adds overhead without benefit. You're paying for coordination of "waiting" that adds no benefit.
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munmap(page,bytes);
Jupiter, Saturn, Venus, Mercury, Neptune and Uranus will all be visible at same time in curved line across sky
同样的情况也发生在我自己身上，我本身就是一个中年程序员大叔，体力和精力比以前弱很多。