[Ide] Only manually run pending events twice a second

Try to avoid calling Application.RunIteration too frequently,
it is a significant slowdown in some cases.

1 files changed, 11 insertions, 3 deletions

diff --git a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide/DispatchService.cs b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide/DispatchService.cs
index 2b5fe24d1a..087afec850 100644
--- a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide/DispatchService.cs
+++ b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide/DispatchService.cs
@@ -119,6 +119,7 @@ namespace MonoDevelop.Ide
 				throw new Exception (errormsg, mc.Exception);
 		}
 		
+		static DateTime lastPendingEvents;
 		public static void RunPendingEvents ()
 		{
 			// The loop is limited to 1000 iterations as a workaround for an issue that some users
@@ -126,10 +127,17 @@ namespace MonoDevelop.Ide
 			// causing the loop to never end.
 			

 			int n = 1000;
-			Gdk.Threads.Enter();

-			while (Gtk.Application.EventsPending () && --n > 0) {

-				Gtk.Application.RunIteration (false);

+			Gdk.Threads.Enter();
+
+			// Check for less than zero in case there's a system time change
+			var diff = DateTime.UtcNow - lastPendingEvents;
+			if (diff > TimeSpan.FromMilliseconds (500) || diff < TimeSpan.Zero) {
+				lastPendingEvents = DateTime.UtcNow;
+				while (Gtk.Application.EventsPending () && --n > 0) {
+					Gtk.Application.RunIteration (false);
+				}
 			}
+
 			Gdk.Threads.Leave();
 			guiDispatcher ();
 		}