improving performance

1 files changed, 2 insertions, 1 deletions

diff --git a/src/moves.cpp b/src/moves.cpp
index c4cda26..fc2b8c7 100644
--- a/src/moves.cpp
+++ b/src/moves.cpp
@@ -182,8 +182,9 @@ std::vector<Move> GetPseudoLegalMoves(Game *b, bool GenerateQuietMoves) {
 std::vector<Move> GetLegalMoves(Game *g, bool quietMove) {
   std::vector<Move> moves = GetPseudoLegalMoves(g, quietMove);
   std::vector<Move> legalMoves;
+  legalMoves.reserve(moves.size());
 
-  for (Move move : moves) {
+  for (const Move &move : moves) {
     UndoMove undo = MakeMove(move, g);
 
     bool legal = true;