[Sideloader] Improve card saving speed

src/Core_Sideloader/UniversalAutoResolver/Core.UAR.Hooks.cs

@@ -211,11 +211,23 @@ private static void ChaFileSaveFilePostHook(ChaFile __instance)
  Sideloader.Logger.LogDebug($"External info: {info.GUID} : {info.Property} : {info.Slot}");
  }
 
+ // Create a property name lookup to speed up saving (on the order of 4 minutes -> 15 seconds when saving fully populated KK game)
+ var extInfoLookup = new Dictionary<string, ResolveInfo>();
+ // To keep backwards compatibility, only the first entry with a given property in the extInfo list should be used if there are multiple.
+ // Achieve this by adding items in reverse so the first instance overwrites the second instance that was already set.
+ // There should be no duplicates most of the time so it's faster to do it this way than check if item exists on each iteration.
+ for (var index = extInfo.Count - 1; index >= 0; index--)
+ {
+ var info = extInfo[index];
+ extInfoLookup[info.Property] = info;
+ }
+
  void ResetStructResolveStructure(Dictionary<CategoryProperty, StructValue<int>> propertyDict, object structure, IEnumerable<ResolveInfo> extInfo2, string propertyPrefix = "")
  {
  foreach (var kv in propertyDict)
  {
- var extResolve = extInfo.FirstOrDefault(x => x.Property == $"{propertyPrefix}{kv.Key}");
+ // Old and slow: var extResolve = extInfo.FirstOrDefault(x => x.Property == $"{propertyPrefix}{kv.Key}");
+ extInfoLookup.TryGetValue($"{propertyPrefix}{kv.Key}", out var extResolve);
 
  if (extResolve != null)
  kv.Value.SetMethod(structure, extResolve.LocalSlot);