舊版 反向連結 目錄表 CompletableFuture - Avoid transition task from one thread to another. It costs. Problem How to resolve? Reference 這是本文件的舊版! CompletableFuture - Avoid transition task from one thread to another. It costs. Problem How to resolve? Reference Asynchronous API with CompletableFuture - Performance Tips and Tricks View the discussion thread.