how to randomize test in JMH

[J Kinable]

I've got 2 algorithms which I would like to compare. An algorithm takes a
data instance as input and produces a certain result. To do a fair but
thorough comparison, I would like to run my algorithms on several different
data instances. Obviously, to make it a fair comparison, both algorithms
should use the same pool of data instances. How would you create such a
test. I could do the following:

@Benchmark
public void testAlgorithm1(){
  for(Instance instance : instances)  algorithm1.run(instance);
}

@Benchmark
public void testAlgorithm2(){
  for(Instance instance : instances)  algorithm2.run(instance);
}

Does this make sense, or would you use a different approach, e.g. use some
of the Setup parameters/annotations?

thanks,

Joris