Improved perf of removing item from unoccupied cells list

1 files changed, 3 insertions, 1 deletions

diff --git a/src/engine/mod.rs b/src/engine/mod.rs
index 227a7f6..6626c0d 100644
--- a/src/engine/mod.rs
+++ b/src/engine/mod.rs
@@ -165,7 +165,9 @@ impl GameState {
                     player.energy_generated += building.energy_generated_per_turn;
                     buildings.push(building);
                 }
-                unoccupied_cells.retain(|&pos| pos != p);
+
+                let to_remove_index = unoccupied_cells.iter().position(|&pos| pos == p).unwrap();
+                unoccupied_cells.swap_remove(to_remove_index);
             },
         }
     }