What are some performance optimizations for CompletableFuture in Java?

What are some performance optimizations for CompletableFuture in Java?

You can optimize CompletableFuture performance by using methods like supplyAsync with a custom executor, minimizing blocking calls, and using thenApplyAsync to chain tasks efficiently.

Can you explain how using a custom executor helps?

Using a custom executor allows you to control the thread pool size and manage resources better, which can lead to improved performance by avoiding thread contention.

What about error handling in CompletableFuture?

Error handling can be managed using methods like handle, exceptionally, or whenComplete, which allow you to define fallback logic for failed computations.

Are there any common pitfalls to avoid?

Yes, common pitfalls include excessive use of blocking calls, not handling exceptions properly, and creating too many CompletableFutures that can lead to resource exhaustion.