fixed huge lag while searching for an asset by delaying the textchanged event, you have 600 milliseconds before it checks your text and search for the asset

FModel/Custom/TypeAssistant.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace FModel.Custom
+{
+    public class TypeAssistant
+    {
+        public event EventHandler Idled = delegate { };
+        public int WaitingMilliSeconds { get; set; }
+        System.Threading.Timer waitingTimer;
+
+        public TypeAssistant(int waitingMilliSeconds = 600)
+        {
+            WaitingMilliSeconds = waitingMilliSeconds;
+            waitingTimer = new Timer(p =>
+            {
+                Idled(this, EventArgs.Empty);
+            });
+        }
+        public void TextChanged()
+        {
+            waitingTimer.Change(WaitingMilliSeconds, System.Threading.Timeout.Infinite);
+        }
+    }
+}

FModel/FModel.csproj

@@ -63,6 +63,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Converter\UnrealEngineDataToOGG.cs" />
+    <Compile Include="Custom\TypeAssistant.cs" />
     <Compile Include="Forms\About.cs">
       <SubType>Form</SubType>
     </Compile>

FModel/Forms/SearchFiles.cs

@@ -1,4 +1,5 @@
-using System;
+using FModel.Custom;
+using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.ComponentModel;
@@ -14,6 +15,7 @@ namespace FModel.Forms
 {
     public partial class SearchFiles : Form
     {
+        TypeAssistant assistant;
         List<FileInfo> myInfos = new List<FileInfo>();
         List<FileInfoFilter> myFilteredInfos;
         private static string fileName;
@@ -25,6 +27,9 @@ namespace FModel.Forms
         public SearchFiles()
         {
             InitializeComponent();
+
+            assistant = new TypeAssistant();
+            assistant.Idled += assistant_Idled;
         }
 
         private async void SearchFiles_Load(object sender, EventArgs e)
@@ -255,12 +260,17 @@ namespace FModel.Forms
 
             listView1.EndUpdate();
         }
-        private async void textBox1_TextChanged(object sender, EventArgs e)
+        void assistant_Idled(object sender, EventArgs e)
         {
-            await Task.Run(() =>
+            this.Invoke(
+            new MethodInvoker(() =>
             {
                 filterListView();
-            });
+            }));
+        }
+        private void textBox1_TextChanged(object sender, EventArgs e)
+        {
+            assistant.TextChanged();
         }
 
         private void button1_Click(object sender, EventArgs e)