jmh:run -i 20 -wi 20 -f2 -t2
The result was on a 2017 15' Macbook Pro (azul jdk 8)
[info] # Run complete. Total time: 00:04:15
[info] Benchmark Mode Cnt Score Error Units
[info] TestBenchmark.duck thrpt 40 45.067 ± 2.296 ops/s
[info] TestBenchmark.oop thrpt 40 51.407 ± 1.035 ops/s
[info] TestBenchmark.typeclass thrpt 40 48.288 ± 1.094 ops/s