$ java -jar target/benchmarks.jar ReadHeavyBenchmark -rf text
(9 reader threads : 1 writer thread per lock type, via JMH @Group/@GroupThreads)

Benchmark                                                  Mode  Cnt       Score       Error   Units
ReadHeavyBenchmark.reentrantLock                          thrpt    5   45225.344 ±  3890.955  ops/ms
ReadHeavyBenchmark.reentrantLock:reentrantLockRead        thrpt    5   39936.906 ±  3728.160  ops/ms
ReadHeavyBenchmark.reentrantLock:reentrantLockWrite       thrpt    5    5288.438 ±  1952.067  ops/ms
ReadHeavyBenchmark.stampedLock                            thrpt    5  915584.241 ± 68486.471  ops/ms
ReadHeavyBenchmark.stampedLock:stampedLockRead            thrpt    5  914889.465 ± 69210.992  ops/ms
ReadHeavyBenchmark.stampedLock:stampedLockWrite           thrpt    5     694.777 ±  1802.294  ops/ms
ReadHeavyBenchmark.synchronizedCounter                    thrpt    5   16320.540 ±  4834.389  ops/ms
ReadHeavyBenchmark.synchronizedCounter:synchronizedRead   thrpt    5   15319.823 ±  5526.566  ops/ms
ReadHeavyBenchmark.synchronizedCounter:synchronizedWrite  thrpt    5    1000.717 ±   860.855  ops/ms