CompletableFuture 的 get() / join() 可能在 ForkJoinPool 的 worker 线程中被调用。如果直接阻塞，就会吃掉池子的并行度。它的解决方案是实现 ManagedBlocker 接口，借助 ForkJoinPool 的补偿机制。
A medium mattress is a nice middle ground between a soft mattress and firm mattress. It’s a great place to start testing beds in a mattress store if you’re experimenting with which firmness level is best for you.
。关于这个话题，51吃瓜提供了深入分析
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.
Install the app (from Releases or from Google Play, for now) and open it