Greatly optimized scrolling performance by setting a max log length for logs that aren't expanded. By default, it's 200 characters.

Author: yasirkula

Plugins/IngameDebugConsole/IngameDebugConsole.prefab

@@ -868,7 +868,8 @@ MonoBehaviour:
   logcatArguments: 
   avoidScreenCutout: 1
   popupAvoidsScreenCutout: 0
-  maxLogLength: 10000
+  maxCollapsedLogLength: 200
+  maxExpandedLogLength: 10000
   autoFocusOnCommandInputField: 1
   logItemPrefab: {fileID: 11408050, guid: 391be5df5ef62f345bb76a1051c04da7, type: 3}
   commandSuggestionPrefab: {fileID: 6838696818539158795, guid: 5e66896448428cf46a1854dbdc014914,
@@ -3470,7 +3471,7 @@ MonoBehaviour:
   m_faceColor:
     serializedVersion: 2
     rgba: 4294967295
-  m_fontSize: 12.3
+  m_fontSize: 16
   m_fontSizeBase: 36
   m_fontWeight: 400
   m_enableAutoSizing: 1
@@ -4095,7 +4096,7 @@ MonoBehaviour:
   m_faceColor:
     serializedVersion: 2
     rgba: 4294967295
-  m_fontSize: 3.5
+  m_fontSize: 16
   m_fontSizeBase: 36
   m_fontWeight: 400
   m_enableAutoSizing: 1

Plugins/IngameDebugConsole/Scripts/DebugLogItem.cs

@@ -69,8 +69,6 @@ public void Initialize( DebugLogRecycledListView listView )
 			logTextOriginalSize = logText.rectTransform.sizeDelta;
 			copyLogButtonHeight = ( copyLogButton.transform as RectTransform ).anchoredPosition.y + ( copyLogButton.transform as RectTransform ).sizeDelta.y + 2f; // 2f: space between text and button
 
-			logText.maxVisibleCharacters = listView.manager.maxLogLength;
-
 			copyLogButton.onClick.AddListener( CopyLog );
 #if !UNITY_EDITOR && UNITY_WEBGL
 			copyLogButton.gameObject.AddComponent<DebugLogItemCopyWebGL>().Initialize( this );
@@ -141,29 +139,47 @@ public void UpdateTimestamp( DebugLogEntryTimestamp timestamp )
 				SetText( logEntry, timestamp, isExpanded );
 		}
 
-		private void SetText( DebugLogEntry logEntry, DebugLogEntryTimestamp? logEntryTimestamp, bool isExpanded )
-		{
-			if( !logEntryTimestamp.HasValue || ( !isExpanded && !listView.manager.alwaysDisplayTimestamps ) )
-				logText.text = isExpanded ? logEntry.ToString() : logEntry.logString;
-			else
-			{
-				StringBuilder sb = listView.manager.sharedStringBuilder;
-				sb.Length = 0;
-
-				if( isExpanded )
-				{
-					logEntryTimestamp.Value.AppendFullTimestamp( sb );
-					sb.Append( ": " ).Append( logEntry.ToString() );
-				}
-				else
-				{
-					logEntryTimestamp.Value.AppendTime( sb );
-					sb.Append( " " ).Append( logEntry.logString );
-				}
-
-				logText.text = sb.ToString();
-			}
-		}
+        private void SetText(DebugLogEntry logEntry, DebugLogEntryTimestamp? logEntryTimestamp, bool isExpanded)
+        {
+            string text = isExpanded ? logEntry.ToString() : logEntry.logString;
+            int maxLogLength = isExpanded ? listView.manager.maxExpandedLogLength : listView.manager.maxCollapsedLogLength;
+
+            if (!logEntryTimestamp.HasValue || (!isExpanded && !listView.manager.alwaysDisplayTimestamps))
+            {
+                if (text.Length <= maxLogLength)
+                    logText.text = text;
+                else
+                {
+                    if (listView.manager.textBuffer.Length < maxLogLength)
+                        listView.manager.textBuffer = new char[maxLogLength];
+
+                    text.CopyTo(0, listView.manager.textBuffer, 0, maxLogLength);
+                    logText.SetText(listView.manager.textBuffer, 0, maxLogLength);
+                }
+            }
+            else
+            {
+                StringBuilder sb = listView.manager.sharedStringBuilder;
+                sb.Length = 0;
+
+                if (isExpanded)
+                {
+                    logEntryTimestamp.Value.AppendFullTimestamp(sb);
+                    sb.Append(": ").Append(text, 0, Mathf.Min(text.Length, maxLogLength - sb.Length));
+                }
+                else
+                {
+                    logEntryTimestamp.Value.AppendTime(sb);
+                    sb.Append(" ").Append(text, 0, Mathf.Min(text.Length, maxLogLength - sb.Length));
+                }
+
+                if (listView.manager.textBuffer.Length < sb.Length)
+                    listView.manager.textBuffer = new char[sb.Length];
+
+                sb.CopyTo(0, listView.manager.textBuffer, 0, sb.Length);
+                logText.SetText(listView.manager.textBuffer, 0, sb.Length);
+            }
+        }
 
 		// This log item is clicked, show the debug entry's stack trace
 		public void OnPointerClick( PointerEventData eventData )

Plugins/IngameDebugConsole/Scripts/DebugLogManager.cs

@@ -199,9 +199,13 @@ public class DebugLogManager : MonoBehaviour
 		[Tooltip( "If enabled, on Android and iOS devices with notch screens, the console window's popup won't be obscured by the screen cutouts" )]
 		internal bool popupAvoidsScreenCutout = false;
 
-		[SerializeField]
-		[Tooltip( "If a log is longer than this limit, it will be truncated. This helps avoid reaching Unity's 65000 vertex limit for UI canvases" )]
-		internal int maxLogLength = 10000;
+        [SerializeField]
+        [Tooltip("If a log that isn't expanded is longer than this limit, it will be truncated. This greatly optimizes scrolling speed of collapsed logs if their log messages are long.")]
+        internal int maxCollapsedLogLength = 200;
+
+        [SerializeField, UnityEngine.Serialization.FormerlySerializedAs("maxLogLength")]
+        [Tooltip("If an expanded log is longer than this limit, it will be truncated. This optimizes scrolling speed while an expanded log is visible.")]
+        internal int maxExpandedLogLength = 10000;
 
 #if UNITY_EDITOR || UNITY_STANDALONE || UNITY_WEBGL
 		[SerializeField]
@@ -407,6 +411,12 @@ public bool PopupEnabled
 		// StringBuilder used by various functions
 		internal StringBuilder sharedStringBuilder;
 
+        /// <summary>
+        /// Used for <see cref="TMP_Text.SetText(char[])"/>.
+        /// </summary>
+        [System.NonSerialized]
+        internal char[] textBuffer = new char[4096];
+
 		// Offset of DateTime.Now from DateTime.UtcNow
 		private System.TimeSpan localTimeUtcOffset;