public async Task StartStress()
        {
            cts?.Cancel();
            cts = new CancellationTokenSource();
            await Task.Run(() => Stress(cts.Token));
        }

        private async Task Stress(CancellationToken token)
        {
            while (!token.IsCancellationRequested)
            {
                var time = DateTime.Now;
                await Task.Run(() => ComputePrime(frontend.GetStressPower()), token);
                frontend.NotifyStressComplete((DateTime.Now - time).Milliseconds);
                await Task.Delay(1, token);
            }
        }