Java Architect Essentials

Jun 20, 2026 · Backend Development

FastUtil High‑Performance Collection Best Practices: Speed Up Your Java Programs

FastUtil, an open‑source library maintained by Sebastiano Vigna, offers type‑specialized Java collections that are typically 2–5× faster and use 40–70% less memory than JDK equivalents, and this article provides detailed benchmarks, a cheat‑sheet of core types, production‑ready code snippets, Maven/Gradle setup, and a checklist of common pitfalls to help developers adopt FastUtil safely and efficiently.