Improve instant search ue

Wox.Core/Plugin/QueryDispatcher/BaseQueryDispatcher.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using Wox.Infrastructure;
+using Wox.Plugin;
+
+namespace Wox.Core.Plugin.QueryDispatcher
+{
+    public abstract class BaseQueryDispatcher : IQueryDispatcher
+    {
+        protected abstract List<PluginPair> GetPlugins(Query query);
+
+        public void Dispatch(Query query)
+        {
+            foreach (PluginPair pair in GetPlugins(query))
+            {
+                PluginPair localPair = pair;
+                if (query.IsIntantQuery && PluginManager.IsInstantSearchPlugin(pair.Metadata))
+                {
+                    DebugHelper.WriteLine(string.Format("Plugin {0} is executing instant search.", pair.Metadata.Name));
+                    using (new Timeit("  => instant search took: "))
+                    {
+                        PluginManager.ExecutePluginQuery(localPair, query);
+                    }
+                }
+                else
+                {
+                    ThreadPool.QueueUserWorkItem(state =>
+                    {
+                        PluginManager.ExecutePluginQuery(localPair, query);
+                    });
+                }
+            }
+        }
+    }
+}