你想要是的稳定，而不是某个时间很强。
https://blog.takipi.com/java-8-stampedlocks-vs-readwritelocks-and-synchronized/
Benchmarking counters with Java 10 Win 7 sp1 i7-6500U CPU @ 2.50GHz
| Dirty | volatile | LongAdder | AtomicLong | OptimisticStamped | ReentrantReadWriteLock | StampedLock | synchronized |
|---|---|---|---|---|---|---|---|
| 1218.8 | 3317.4 | 2198.5 | 3520.3 | 41851.9 | 54337.4 | 35648.1 | 7340.8 |
| 1344.1 | 3179.8 | 2307.5 | 3706.7 | 26304.5 | 62204.5 | 52967.9 | 7052.8 |
| 1204.1 | 2918.4 | 2266 | 3443.1 | 25534.8 | 50312.7 | 36302.6 | 7440.1 |