Benchmarking regex vs string.Replace

Program.cs

// BenchmarkDotNet=v0.13.1, OS=Windows 10.0.22000
// Intel Core i7-10510U CPU 1.80GHz, 1 CPU, 8 logical and 4 physical cores
//     [Host]     : .NET Framework 4.8 (4.8.4420.0), X86 LegacyJIT
//     DefaultJob : .NET Framework 4.8 (4.8.4420.0), X86 LegacyJIT
// 
// 
//     |                                  Method |       Mean |      Error |     StdDev |
//     |---------------------------------------- |-----------:|-----------:|-----------:|
//     |           Replacement_WithStringReplace |   7.852 us |  0.1834 us |  0.5203 us |
//     | Replacement_WithStringReplace_WithArray |   7.556 us |  0.1400 us |  0.2922 us |
//     |                 Regex_WithStringReplace | 817.548 us | 15.8934 us | 37.4626 us |
// 
//
//
// BenchmarkDotNet=v0.13.1, OS=Windows 10.0.22000
// Intel Core i7-10510U CPU 1.80GHz, 1 CPU, 8 logical and 4 physical cores
// .NET SDK=6.0.101
//   [Host]     : .NET 6.0.1 (6.0.121.56705), X64 RyuJIT
//   DefaultJob : .NET 6.0.1 (6.0.121.56705), X64 RyuJIT
// 
// 
// |                                  Method |         Mean |      Error |     StdDev |       Median |
// |---------------------------------------- |-------------:|-----------:|-----------:|-------------:|
// |           Replacement_WithStringReplace |     1.223 us |  0.0577 us |  0.1694 us |     1.181 us |
// | Replacement_WithStringReplace_WithArray |     1.133 us |  0.0459 us |  0.1353 us |     1.067 us |
// |                 Regex_WithStringReplace | 1,223.588 us | 24.2832 us | 60.4737 us | 1,199.225 us |

using System.Linq;
using System.Text.RegularExpressions;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

namespace Bench
{
    public class Program
    {
        private const string Source = @"
NX3TME0F""IQDZ-9WF9FRJ8Y0-HBX6V1ELEW5""QEC=-75-UUAH3&6531S""DUECDNRVM5VQEX24DUKB61S
0BQCZ8MWRD5&9""A7ZPJ03""XCFHB2JQRGPCSB0K60""IDNN175C0ZZXB31RO&S7YNAZYV6V-GOXW1U9K2S
NKZX56XNN4XMNO6O9D12FBJETKBANI5GZREX""3J6BHT4P8BJ3MY6XANMAVDU5W""E""Q19JJPF890-WT2Z
J6KBY""XYE6XR02ASHO5-GF""U&S-1NO4V6SL""M-UA7C4R0-TF8I5H14SD63EGA9L4CBZHQBGI85EEOW8-
-67FXW7BAHGW7N""=5AOYMM36BWN&ZN3K9GHICFHTHXGI9XOU5HNOHJZZDADAJ&P0S&11G59Z78Q2FU=R
H6FSAPCZUVEBBGKKHU4-&1OAM1UM6&UWD07Q5=ZD7BHY07X1YGVZ4-VUSEFN846XBW-PM8SK80F8T3NS
E720P96EEN=15MIDIXWE";

        public static void Main(string[] args)
        {
            BenchmarkRunner.Run<Program>();
        }
        
        [Benchmark]
        public string Replacement_WithStringReplace()
        {
            var source = Source;
            return source
                .Replace("&", string.Empty)
                .Replace("=", string.Empty)
                .Replace("\"", string.Empty);
        }
        
        [Benchmark]
        public string Replacement_WithStringReplace_WithArray()
        {
            var chars = new string[] { "&", "=", "\"" };
            var source = Source;
            foreach (var charToReplace in chars)
            {
                source = source.Replace(charToReplace, string.Empty);
            }

            return source;
        }

        [Benchmark]
        public string Regex_WithStringReplace()
        {
            var regex = new Regex("[&=\"]", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant | RegexOptions.Compiled);
            return regex.Replace(Source, string.Empty);
        }
    }
}