debug_shims.cs

	// A quick and dirty "how often is the GC being called, in 1/4 second increments
	// Useful if you think your allocation pattern is hurting but can't load up in a real profiler
	static int currentGC = 0;
	static int currentCount = 0;
	static void Main (string[] args)
	{
		Task.Factory.StartNew (() => {
			while (true)
			{
				int now = GC.CollectionCount (0);
				if (currentGC == now) {
					currentCount++;
				}
				else
				{
					Console.WriteLine (/*"Gen {0} - */"{1}", currentGC, currentCount);
					currentGC = now;
					currentCount = 1;
				}
				Thread.Sleep (250);
			}
		});
	}
	
	// A "fake NSView" of different colors you can replace views with to 
	// rule out slow views being the problem.
	NSView MakeFakeView ()
	{
		NSView v = new NSView (new CoreGraphics.CGRect (0, 0, 0, 0));
		v.WantsLayer = true;
		v.Layer.BackgroundColor = GenerateRandomColor ();
		return v;
	}

	CGColor GenerateRandomColor()
	{
		Random random = new Random();
		double red = random.NextDouble ();
		double green = random.NextDouble ();
		double blue = random.NextDouble ();
		red = (red + 1) / 2;
		green = (green + 1) / 2;
		blue = (blue + 1) / 2;
		return new CGColor((nfloat)red, (nfloat)green, (nfloat)blue);
	}

	// Sometimes Console.WriteLine doesn't work, due to redirection, caches not flushing, or other such nonsense
        // You can use this to dump to a file 
	public static class DebugCWL
	{
		[System.Runtime.InteropServices.DllImport ("__Internal")]
		static extern System.IntPtr NSHomeDirectory ();

		static string HomeDirectory 
		{
			get 
			{
				NSString s = ObjCRuntime.Runtime.GetNSObject<NSString> (NSHomeDirectory ());
				return (string)s;
			}
		}

		public static void WriteLine (string s)
		{
			System.IO.File.AppendAllText (System.IO.Path.Combine (HomeDirectory, "DebugCWL.txt"), s + "\n");
		}

		public static void WriteLine (string s, params object [] args)
		{
			DebugCWL.WriteLine (string.Format (s, args));
		}
	}