Java
Performance Pitfalls
Real-world performance: why Big-O hides constant factors, actual memory footprints, JMH benchmarking, JFR/JMC monitoring, and collection-specific antipatterns.
Java
HashMap: Tree Bins and Performance
Explore Java 8's tree bins enhancement: Red-Black trees in collided buckets, treeify thresholds, the HashDoS security fix, and hybrid linked list/tree approach.
Algorithms
ArrayList vs LinkedList
Visual comparison of ArrayList vs LinkedList: see operation complexity differences side-by-side. Know when to use which.