Java
HashMap Internals: Buckets, Treeification, and Resizing
HashMap's average O(1) performance depends on assumptions about hash distribution and load factor that are worth understanding before they're violated.
3 min read
Tag
Collections
3 articles
Java
equals, hashCode, and the Contracts That Break Collections
A broken equals or hashCode doesn't crash your program — it quietly corrupts HashMaps and HashSets in ways that only show up much later.
3 min read
Java
Stream API Pitfalls That Quietly Kill Performance
Streams read beautifully in code review and hide real performance costs in production. Here are the traps that show up most often and how to avoid them.
3 min read