// петушарп

long integer_ = 100;
var time1 = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
var tasks = new List<Task<bool>>();
for (var i = 0; i < 100_000; i++)
{
    var task = new Task<bool>(() =>
    {
        Thread.Sleep(100);
        integer_ += 50;
        return true;
    });
    task.Start();
    tasks.Add(task);
}
foreach (var task in tasks)
{
    task.Wait();
}
var time2 = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
Console.WriteLine($"Result = {integer_}; Time consumed = {(time2-time1) / 1_000} s");


// джава

    ExecutorService executor = Executors.newVirtualThreadPerTaskExecutor();
    AtomicLong integer_ = new AtomicLong(100);
    long nano1 = System.nanoTime();
    List<Future<?>> futures = new ArrayList<>(1_000_000);
    for (int i = 0; i < 100_000; i++) {
        futures.add(executor.submit(() -> {
            UnsafeThread.sleep(100);
            integer_.addAndGet(50);
        }));
    }
    for (Future<?> future : futures) future.get();
    long nano2 = System.nanoTime();
    System.out.println(STR."""
        Result = \{integer_.get()};
        Time consumed = \{(nano2-nano1)/1_000_000_000} s
    """