Algorythm

Your Java Singleton Choice Could Make Your App 871x Slower

The article benchmarks three Java singleton implementations—synchronized, double‑checked locking (DCL), and initialization‑on‑demand holder—and finds the holder pattern up to 871 times faster than the synchronized version and 115 times faster than DCL. In a billion‑operation test the holder took just 4 ms, while synchronized required 3.5 seconds. The author explains why these differences matter for high‑throughput, low‑latency services and recommends the holder pattern as the default choice. A migration guide shows how existing code can be refactored with minimal risk.