WinCE5 10x faster than CE6R3

Question

Working on some personal project involved a lot of graphics, using BitBlt and Alpha-blend to achieve the look I want.

I finding CE6 taking great amount of time to handle that "C#" code w/P/Invoke.

Created a simple app to measure how much time it take from frame to frame.

//Draw in a new thread !!

private void button5_Click(object sender, EventArgs e)
        {
            cycle = true;
            Thread drawBmp = new Thread(new ThreadStart(this.draw));
            drawBmp.Start();
            drawBmp.Priority = ThreadPriority.AboveNormal;
        }

public void draw()
            {
                Bitmap bm = new Bitmap("\\Program Files\\demo\\Base.png");
                Graphics gx = this.CreateGraphics();
                //Pen gp = new Pen(Color.Red, 3F);
                int x = 0;
                Bitmap buffer = new Bitmap(250, 51);
                Graphics gfx = Graphics.FromImage(buffer);
                long startTime = Environment.TickCount;
                while (x < 200)
                {               
                    x++;
                    gfx.Clear(Color.DarkBlue);
                    gfx.DrawImage(bm, x, 0);
                    gx.DrawImage(buffer, 10, 100);
                }
                long endTime = Environment.TickCount;
                elapsedTime = endTime - startTime;
                textBox1.Invoke(mydelegate);
                gfx.Dispose();
                buffer.Dispose();
                bm.Dispose();
            }

 

The 200 draw takes 480ms if Enviroment.TickCount is 1ms per tick !!?? The same code finish in 160ms in Windows CE5, I know that isn't 10x faster, but if I move the mouse while drawing the worst I got was 1850 ms and in winCE5 only got up 180ms. In this http://social.msdn.microsoft.com/Forums/en-US/winembplatdev/thread/03ad5fa4-386e-4398-ba3e-e44690334ee7 thread users talking about why, "The kernel architecture has changed dramatically in CE6 to support the 2GB user application space among other things.  As a result, the cache is flushed more aggressively.  In your specific case (heavy use of API calls) performance can be worse in CE6."

My question here is what can I do to achieve similar or better performance on my hardware with CE6 ?

 

 

Answer 1

Differebt machine has different performance, did you tested them on the same machine?

---

NEU_ShieldEdge

Answer 2

Yes exactly same hardware, unfortunatly the CE5 image dont have all the component I need, but I finding IE run faster, WMP runs in full screen perfectly smooth, in CE6 cant switch WMP to full screen because frame-rate droop to 3.5 FPS.....