perf: improve TaskHelpers.Iterate. There's a huge perf penalty for switch threads on completed tasks.

MikeStall · MikeStall · commit 5a642d10e1a6 · 2012-04-04T08:43:14.000-07:00
diff --git a/src/Common/TaskHelpers.cs b/src/Common/TaskHelpers.cs
@@ -404,7 +404,7 @@ private static void RunNextCallback(object state)
                                     RunNext(engine);
                                     break;
                             }
-                        });
+                        }, TaskContinuationOptions.ExecuteSynchronously);
                     }
                     else
                     {

Original file line number	Diff line number	Diff line change
`@@ -404,7 +404,7 @@ private static void RunNextCallback(object state)`
`404`	`404`	`RunNext(engine);`
`405`	`405`	`break;`
`406`	`406`	`}`
`407`		`- });`
	`407`	`+ }, TaskContinuationOptions.ExecuteSynchronously);`
`408`	`408`	`}`
`409`	`409`	`else`
`410`	`410`	`{`