use Lazy<FieldInfo[]> for synced entry fields

Author: Lordfirespeed

CSync/Lib/SyncedConfig.cs

@@ -27,13 +27,16 @@ public SyncedConfig(string guid)
     /// </summary>
     public string GUID { get; }
 
-    internal void PopulateEntryContainer()
-    {
-        var fields = AccessTools.GetDeclaredFields(typeof(T))
+    private static Lazy<FieldInfo[]> SyncedEntryFields = new(
+        () => AccessTools.GetDeclaredFields(typeof(T))
             .Where(field => field.GetCustomAttribute<DataMemberAttribute>() is not null)
-            .Where(field => typeof(SyncedEntryBase).IsAssignableFrom(field.FieldType));
+            .Where(field => typeof(SyncedEntryBase).IsAssignableFrom(field.FieldType))
+            .ToArray()
+    );
 
-        foreach (var fieldInfo in fields)
+    internal void PopulateEntryContainer()
+    {
+        foreach (var fieldInfo in SyncedEntryFields.Value)
         {
             var entryBase = (SyncedEntryBase)fieldInfo.GetValue(this);
             EntryContainer.Add(entryBase.BoxedEntry.ToSyncedEntryIdentifier(), entryBase);