Thread Suspension Repro

ThreadSuspension.cs

using System.Diagnostics;
using System.Runtime.CompilerServices;

namespace ThreadSuspension
{
    internal class Program
    {
        private static readonly CancellationTokenSource _cts = new CancellationTokenSource();
        private static IIdleStrategy _idleStrategy = new NoOpIdleStrategy();

        static void Main(string[] args)
        {
            var thread = new Thread(WorkLoop);
            thread.Start();

            var watch = new Stopwatch();
            for (int i = 0; i < 50; i++)
            {
                watch.Restart();
                GC.Collect();
                watch.Stop();
                Console.WriteLine(watch.ElapsedMilliseconds);
            }

            _cts.Cancel();
            thread.Join();
        }
        
        public static void WorkLoop(object? _)
        {
            while (!_cts.IsCancellationRequested)
            {
                _idleStrategy.Idle(0);
            }
        }
    }

    public interface IIdleStrategy
    {
        void Idle(int workCount);
    }

    public class NoOpIdleStrategy : IIdleStrategy
    {
        [MethodImpl(MethodImplOptions.NoInlining)]
        public void Idle(int workCount)
        {
        }
    }
}