备份，准备做双端

Assets/scripts/gamePlay_gameplay/TrackJudgeHitEffectController.cs

@@ -60,6 +60,18 @@ public class TrackJudgeHitEffectController : MonoBehaviour
     private readonly Dictionary<GameObject, ParticleCacheEntry> particleCache =
         new Dictionary<GameObject, ParticleCacheEntry>();
 
+    // 【性能】延迟回收改用 Update 轮询,替代每命中 StartCoroutine + new WaitForSecondsRealtime 的分配。
+    // dueUnscaledTime 用 Time.unscaledTime 记录到期时刻,与原 WaitForSecondsRealtime(realtime)语义一致;
+    // token 校验也原样保留,故回收时机与行为完全等效,仅消除每命中的协程/等待对象 GC。
+    private struct PendingParticleReturn
+    {
+        public GameObject Instance;
+        public ParticleCacheEntry Entry;
+        public int RentToken;
+        public float DueUnscaledTime;
+    }
+    private readonly List<PendingParticleReturn> pendingParticleReturns = new List<PendingParticleReturn>();
+
     private void Awake()
     {
         if (Instance == null)
@@ -299,7 +311,39 @@ public class TrackJudgeHitEffectController : MonoBehaviour
         Color tint = GetTrackColor(trackIndex);
         ApplyParticleColor(entry, tint);
 
-        StartCoroutine(RecycleParticleRoutine(instance, entry, CurrentParticleRentToken(instance), Mathf.Max(0.05f, entry.Lifetime)));
+        // 入队延迟回收(Update 轮询),替代每命中 StartCoroutine + WaitForSecondsRealtime 分配。等效。
+        float delay = Mathf.Max(0.05f, entry.Lifetime);
+        pendingParticleReturns.Add(new PendingParticleReturn
+        {
+            Instance = instance,
+            Entry = entry,
+            RentToken = CurrentParticleRentToken(instance),
+            DueUnscaledTime = Time.unscaledTime + delay
+        });
+    }
+
+    private void Update()
+    {
+        if (pendingParticleReturns.Count == 0)
+            return;
+
+        float nowUnscaled = Time.unscaledTime;
+        for (int i = pendingParticleReturns.Count - 1; i >= 0; i--)
+        {
+            var pending = pendingParticleReturns[i];
+            if (nowUnscaled < pending.DueUnscaledTime)
+                continue;
+
+            pendingParticleReturns.RemoveAt(i);
+
+            // 与原 RecycleParticleRoutine 等效:实例已毁或已被重新租用(token 变了)则不回收。
+            if (pending.Instance == null)
+                continue;
+            if (CurrentParticleRentToken(pending.Instance) != pending.RentToken)
+                continue;
+
+            ReturnParticleInstance(pending.Instance, pending.Entry);
+        }
     }
 
     // Prewarm the track particle pool during load so the first judge does not pay
@@ -407,20 +451,8 @@ public class TrackJudgeHitEffectController : MonoBehaviour
         return instance != null && particleRentIds.TryGetValue(instance, out int token) ? token : -1;
     }
 
-    private IEnumerator RecycleParticleRoutine(GameObject instance, ParticleCacheEntry entry, int rentToken, float delay)
-    {
-        // Short visual FX should always recycle in real time. Tying them to
-        // GameplayClock can leak rented objects while the song clock is paused.
-        yield return new WaitForSecondsRealtime(Mathf.Max(0f, delay));
-
-        if (instance == null)
-            yield break;
-
-        if (CurrentParticleRentToken(instance) != rentToken)
-            yield break;
-
-        ReturnParticleInstance(instance, entry);
-    }
+    // 说明:原 RecycleParticleRoutine 协程(每命中 StartCoroutine + new WaitForSecondsRealtime)已由
+    // Update 轮询的 pendingParticleReturns 替代,回收时机(unscaled/realtime)与 token 校验语义完全一致。
 
     private void ReturnParticleInstance(GameObject instance, ParticleCacheEntry entry)
     {
@@ -459,6 +491,9 @@ public class TrackJudgeHitEffectController : MonoBehaviour
             particleCache.TryGetValue(instance, out var entry);
             ReturnParticleInstance(instance, entry);
         }
+
+        // 所有租用粒子已强制回收,清空延迟回收队列避免残留项(与原协程在 OnDisable/OnDestroy 随之停止等效)。
+        pendingParticleReturns.Clear();
     }
 
     private Color GetTrackColor(int trackIndex)