public static void Run()
{
const int count = 1000000;
var fixture = new Fixture();
var strings = new List <string>();
for (int i = 0; i < count; i++)
{
var generatedTextWithPrefix = fixture.Create("str");
strings.Add(generatedTextWithPrefix);
}
var list1 = strings.RandomSubset(count / 2).ToList();
var list2 = strings.RandomSubset(count / 2).ToList();
var comparer = new StringComparison(list1, list2);
Console.WriteLine(Time(() => comparer.CompareLowercase()));
Console.WriteLine(Time(() => comparer.CompareUppercase()));
Console.WriteLine(Time(() => comparer.CompareStringEquals()));
}