What are the performance benchmarks of ConcurrentHashMap?

What are the performance benchmarks of ConcurrentHashMap compared to HashMap?

ConcurrentHashMap generally offers better performance in multi-threaded environments due to its lock-free reads and segmented locking.

Can you explain how the locking mechanism works in ConcurrentHashMap?

Sure! ConcurrentHashMap uses a technique called lock striping, where the map is divided into segments, each with its own lock.

How does this affect read and write operations?

It allows multiple threads to read from different segments simultaneously, improving read performance, while writes are still efficient due to localized locking.

Are there any scenarios where HashMap might be preferred over ConcurrentHashMap?

Yes, if you're working in a single-threaded context or if you don't need concurrent access, HashMap is simpler and faster.