أي خيط ينفّذ مرحلتي؟

في هذا الدرس

choose executors deliberately.

الموضوعات المخطط لها

• Without an executor, async methods use the common ForkJoinPool, sized for CPU work.
• Blocking I/O in the common pool starves everything else that uses it, including parallel streams.
• Pass a dedicated executor for blocking calls: supplyAsync(task, ioPool).
• Non-Async methods (thenApply) run on whichever thread completes the previous stage (or the caller if already complete); thenApplyAsync hops to a pool.
• Never call join() inside a stage on a pool that may be exhausted.