ConvertAllBenchmark

gistfile1.txt

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System.Collections.Generic;
using System.Linq;

[MemoryDiagnoser]
[DisassemblyDiagnoser]
public class Program
{
    private List<int> list = Enumerable.Repeat(10, 10).ToList();
    static void Main()
    {
        BenchmarkRunner.Run<Program>();
    }
    [Benchmark]
    public List<string> M()
    {
        return list.Select(t => t.ToString()).ToList();
    }
    [Benchmark]
    public List<string> N()
    {
        return list.ConvertAll(t => t.ToString());
    }
}