Improve sort tcomp path

[2A5F]

#116109 (comment)

This may not be necessary, but it's still worth improving.

[2A5F]

@EgorBot -intel -arm

using BenchmarkDotNet.Attributes;

public class Bench
{
    int[] a = new int[10000];
    int[] b = new int[10000];
    MyComparer<string> c = new MyComparer<string>();

    [IterationSetup]
    public void IterationSetup() { for (int i = 0; i < a.Length; i++) a[i] = i; }

    [Benchmark]
    public void Sort() => MemoryExtensions.Sort(a, b, c);

    struct MyComparer<T> : IComparer<int>
    {
        T state;
        long a,b,c,d,e,f;

        public int Compare(int x, int y) => x-y;
    }   
}