Optimize GC for status info.

Assets/Cryville/Crtr/ChartPlayer.cs

@@ -1,6 +1,7 @@
 #define BUILD
 
 using Cryville.Common;
+using Cryville.Common.Buffers;
 using Cryville.Crtr.Config;
 using Cryville.Crtr.Event;
 using Newtonsoft.Json;
@@ -8,7 +9,9 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Text;
+using System.Text.Formatting;
 using System.Threading;
+using TMPro;
 using UnityEngine;
 using UnityEngine.Networking;
 using UnityEngine.SceneManagement;
@@ -45,7 +48,9 @@ namespace Cryville.Crtr {
 
 		static bool initialized;
 		static Text logs;
-		Text status;
+		TextMeshProUGUI status;
+		readonly TargetString statusstr = new TargetString();
+		readonly StringBuffer statusbuf = new StringBuffer();
 
 		static Vector2 screenSize;
 		public static Rect hitRect;
@@ -81,7 +86,7 @@ namespace Cryville.Crtr {
 			}
 			OnSettingsUpdate();
 
-			status = GameObject.Find("Status").GetComponent<Text>();
+			status = GameObject.Find("Status").GetComponent<TextMeshProUGUI>();
 
 			texHandler = new DownloadHandlerTexture();
 #if BUILD
@@ -107,7 +112,6 @@ namespace Cryville.Crtr {
 			if (texLoader != null) texLoader.Dispose();
 			if (inputProxy != null) inputProxy.Dispose();
 			if (texs != null) foreach (var t in texs) Texture.Destroy(t.Value);
-			Camera.onPostRender -= OnCameraPostRender;
 			GC.Collect();
 		}
 
@@ -216,7 +220,6 @@ namespace Cryville.Crtr {
 				}
 			}
 		}
-		string timetext = string.Empty;
 		void LogUpdate() {
 			string _logs = logs.text;
 			Game.MainLogger.Enumerate((level, module, msg) => {
@@ -236,7 +239,8 @@ namespace Cryville.Crtr {
 				);
 			});
 			logs.text = _logs.Substring(Mathf.Max(0, _logs.IndexOf('\n', Mathf.Max(0, _logs.Length - 4096))));
-			var sttext = string.Format(
+			statusbuf.Clear();
+			statusbuf.AppendFormat(
 				"FPS: i{0:0} / s{1:0}\nSMem: {2:N0} / {3:N0}\nIMem: {4:N0} / {5:N0}",
 				1 / Time.deltaTime,
 				1 / Time.smoothDeltaTime,
@@ -253,25 +257,27 @@ namespace Cryville.Crtr {
 #endif
 			);
 			if (started) {
-				sttext += string.Format(
+				statusbuf.AppendFormat(
 					"\nStates: c{0} / b{1}",
 					cbus.ActiveStateCount, bbus.ActiveStateCount
 				);
-				sttext += timetext;
-				if (judge != null) sttext += "\n== Scores ==\n" + judge.GetFullFormattedScoreString();
+				statusbuf.AppendFormat(
+					"\nSTime: {0:G17}s {3}\ndATime: {1:+0.0ms;-0.0ms;0} {3}\ndITime: {2:+0.0ms;-0.0ms;0} {3}",
+					cbus.Time,
+					(Game.AudioClient.Position - atime0 - cbus.Time) * 1e3,
+					(inputProxy.GetTimestampAverage() - cbus.Time) * 1e3,
+					forceSyncFrames != 0 ? "(force sync)" : ""
+				);
+				if (judge != null) {
+					statusbuf.Append("\n== Scores ==\n");
+					var fullScoreStr = judge.GetFullFormattedScoreString();
+					statusbuf.Append(fullScoreStr.TrustedAsArray(), 0, fullScoreStr.Length);
+				}
 			}
-			status.text = sttext;
-		}
-		void OnCameraPostRender(Camera cam) {
-			if (!started) return;
-			if (!logEnabled) return;
-			timetext = string.Format(
-				"\nSTime: {0:R}s {3}\ndATime: {1:+0.0ms;-0.0ms;0} {3}\ndITime: {2:+0.0ms;-0.0ms;0} {3}",
-				cbus.Time,
-				(Game.AudioClient.Position - atime0 - cbus.Time) * 1e3,
-				(inputProxy.GetTimestampAverage() - cbus.Time) * 1e3,
-				forceSyncFrames != 0 ? "(force sync)" : ""
-			);
+			statusstr.Length = statusbuf.Count;
+			var arr = statusstr.TrustedAsArray();
+			statusbuf.CopyTo(0, arr, 0, statusbuf.Count);
+			status.SetText(arr, 0, statusbuf.Count);
 		}
 		#endregion
 
@@ -302,7 +308,7 @@ namespace Cryville.Crtr {
 		bool logEnabled = true;
 		public void ToggleLogs() {
 			logs.text = "";
-			status.text = "";
+			status.SetText("");
 			logEnabled = !logEnabled;
 		}
 
@@ -330,8 +336,6 @@ namespace Cryville.Crtr {
 			Game.NetworkTaskWorker.SuspendBackgroundTasks();
 			Game.AudioSession = Game.AudioSequencer.NewSession();
 
-			Camera.onPostRender += OnCameraPostRender;
-
 			var hitPlane = new Plane(Vector3.forward, Vector3.zero);
 			var r0 = Camera.main.ViewportPointToRay(new Vector3(0, 0, 1));
 			float dist;