BenchmarkBatched-2          5000            922107 ns/op
BenchmarkLockstep-2         1000           3023096 ns/op
BenchmarkLockstepBusy-2     1000           2724352 ns/op
BenchmarkLockstepChan-2     1000           2580709 ns/op
BenchmarkNaive-2            2000           2326375 ns/op
BenchmarkNonConcurrent-2    2000           1685310 ns/op

On a 2010 MacBook Pro