Optimize GC for log in gameplay scene.

Assets/Cryville/Crtr/ChartPlayer.cs

@@ -47,10 +47,8 @@ namespace Cryville.Crtr {
 		bool started = false;
 
 		static bool initialized;
-		static Text logs;
+		TextMeshProUGUI logs;
 		TextMeshProUGUI status;
-		readonly TargetString statusstr = new TargetString();
-		readonly StringBuffer statusbuf = new StringBuffer();
 
 		static Vector2 screenSize;
 		public static Rect hitRect;
@@ -79,7 +77,7 @@ namespace Cryville.Crtr {
 		void Start() {
 			var logobj = GameObject.Find("Logs");
 			if (logobj != null)
-				logs = logobj.GetComponent<Text>();
+				logs = logobj.GetComponent<TextMeshProUGUI>();
 			if (!initialized) {
 				Game.Init();
 				GenericResources.LoadDefault();
@@ -222,8 +220,14 @@ namespace Cryville.Crtr {
 				}
 			}
 		}
+		readonly TargetString statusstr = new TargetString();
+		readonly StringBuffer statusbuf = new StringBuffer();
+		readonly TargetString logsstr = new TargetString();
+		readonly StringBuffer logsbuf = new StringBuffer();
+		readonly List<string> logEntries = new List<string>();
+		int logsLength = 0;
 		void LogUpdate() {
-			string _logs = logs.text;
+			logsbuf.Clear();
 			Game.MainLogger.Enumerate((level, module, msg) => {
 				string color;
 				switch (level) {
@@ -235,12 +239,25 @@ namespace Cryville.Crtr {
 					case 5: color = "#bb0000"; break;
 					default: color = "#ff00ff"; break;
 				}
-				_logs += string.Format(
-					"\r\n<color={1}bb><{2}> {3}</color>",
+				var l = string.Format(
+					"\n<color={1}bb><{2}> {3}</color>",
 					DateTime.UtcNow.ToString("s"), color, module, msg
 				);
+				logEntries.Add(l);
+				logsLength += l.Length;
 			});
-			logs.text = _logs.Substring(Mathf.Max(0, _logs.IndexOf('\n', Mathf.Max(0, _logs.Length - 4096))));
+			while (logsLength >= 4096) {
+				logsLength -= logEntries[0].Length;
+				logEntries.RemoveAt(0);
+			}
+			foreach (var l in logEntries) {
+				logsbuf.Append(l);
+			}
+			logsstr.Length = logsbuf.Count;
+			var larr = logsstr.TrustedAsArray();
+			logsbuf.CopyTo(0, larr, 0, logsbuf.Count);
+			logs.SetText(larr, 0, logsbuf.Count);
+
 			statusbuf.Clear();
 			statusbuf.AppendFormat(
 				"FPS: i{0:0} / s{1:0}\nSMem: {2:N0} / {3:N0}\nIMem: {4:N0} / {5:N0}",
@@ -281,9 +298,9 @@ namespace Cryville.Crtr {
 				}
 			}
 			statusstr.Length = statusbuf.Count;
-			var arr = statusstr.TrustedAsArray();
-			statusbuf.CopyTo(0, arr, 0, statusbuf.Count);
-			status.SetText(arr, 0, statusbuf.Count);
+			var sarr = statusstr.TrustedAsArray();
+			statusbuf.CopyTo(0, sarr, 0, statusbuf.Count);
+			status.SetText(sarr, 0, statusbuf.Count);
 		}
 		#endregion
 
@@ -313,7 +330,8 @@ namespace Cryville.Crtr {
 
 		bool logEnabled = true;
 		public void ToggleLogs() {
-			logs.text = "";
+			logEntries.Clear();
+			logsLength = 0;
 			status.SetText("");
 			logEnabled = !logEnabled;
 		}
@@ -450,7 +468,8 @@ namespace Cryville.Crtr {
 				timer.Stop();
 				Logger.Log("main", 1, "Load/Prehandle", "Prehandling done ({0}ms)", timer.Elapsed.TotalMilliseconds);
 				if (Settings.Default.ClearLogOnPlay) {
-					logs.text = "";
+					logEntries.Clear();
+					logsLength = 0;
 					Game.MainLogger.Enumerate((level, module, msg) => { });
 				}
 				Game.AudioSequencer.Playing = true;