private static ValueTuple <int, int> RunBenchmark(int sourceLength, int subCollectionLength)
{
const int N = 100000;
var source = Enumerable.Range(1, sourceLength).ToArray();
var subCollection = Enumerable.Range(1, subCollectionLength).ToArray(); // This gets repeated `sourceLength` times.
var iterator = source.SelectMany(_ => subCollection);
return(Benchmarker.Bench(state =>
{
for (int i = 0; i < N; i++)
{
state.ToArray();
}
}, iterator));
}