feat: memoize account names

lib/data/memo.dart

@@ -0,0 +1,18 @@
+class Memoizer<K, V> {
+  final V Function(K) compute;
+
+  final Map<K, V> _cache = {};
+
+  Memoizer({required this.compute});
+
+  V get(K key) {
+    if (!_cache.containsKey(key)) {
+      _cache[key] = compute(key);
+    }
+    return _cache[key] = compute(key);
+  }
+
+  void remove(K key) {
+    _cache.remove(key);
+  }
+}

lib/objectbox/actions.dart

@@ -2,6 +2,7 @@ import 'dart:developer';
 import 'dart:math' as math;
 
 import 'package:flow/data/flow_analytics.dart';
+import 'package:flow/data/memo.dart';
 import 'package:flow/data/money_flow.dart';
 import 'package:flow/data/prefs/frecency_group.dart';
 import 'package:flow/entity/account.dart';
@@ -370,13 +371,17 @@ extension TransactionListActions on Iterable<Transaction> {
 }
 
 extension AccountActions on Account {
-  /// I'm super sleepy and practically a zombie r.n.
-  ///
-  /// This is probably better of as Singleton somewhere with memoization as
-  /// account names won't get changed that frequently (I hope)
-  ///
-  /// TODO refactor this to be more efficient
+  static Memoizer<String, String?>? accountNameToUuid;
+
   static String nameByUuid(String uuid) {
+    accountNameToUuid ??= Memoizer(
+      compute: _nameByUuid,
+    );
+
+    return accountNameToUuid!.get(uuid) ?? "???";
+  }
+
+  static String _nameByUuid(String uuid) {
     final query =
         ObjectBox().box<Account>().query(Account_.uuid.equals(uuid)).build();