Xiao Lou's Tech Notes

May 19, 2020 · Backend Development

Can You Build a Faster Counter Than Java’s LongAdder? A Deep Dive

An in‑depth Java performance study explores LongAdder, compares it with AtomicLong and lock‑based counters using JMH, and walks through successive custom implementations (V0‑V5) that apply striping, modulo optimization, false‑sharing elimination, and advanced hash probing to approach or surpass LongAdder’s throughput.