Minor performance tweaks

tests/common/library_loader.rs

@@ -450,7 +450,7 @@ where
 }
 
 fn parse_moves(value: &Value, move_library: &Box<dyn MoveLibrary>) -> Box<dyn LearnableMoves> {
-    let mut moves = LearnableMovesImpl::default();
+    let mut moves = LearnableMovesImpl::new(100);
 
     let level_moves = value.get("levelMoves").unwrap().as_array().unwrap();
     for level_move in level_moves {