From a90b767995850d69d687aad1c7bdebed073b9295 Mon Sep 17 00:00:00 2001
From: smatz <smatz@openttd.org>
Date: Sun, 1 Jan 2012 17:32:45 +0000
Subject: [PATCH] (svn r23705) -Codechange: cache the last processed station in
 FindStationsAroundTiles() in order to make the code a bit faster

---
 src/station_cmd.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
index 2086f31501..329dcfb3a3 100644
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -3407,12 +3407,19 @@ void FindStationsAroundTiles(const TileArea &location, StationList *stations)
 	if (max_x >= MapSizeX()) max_x = MapSizeX() - 1;
 	if (max_y >= MapSizeY()) max_y = MapSizeY() - 1;
 
+	StationID last = INVALID_STATION;
+
 	for (uint cy = min_y; cy < max_y; cy++) {
 		for (uint cx = min_x; cx < max_x; cx++) {
 			TileIndex cur_tile = TileXY(cx, cy);
 			if (!IsTileType(cur_tile, MP_STATION)) continue;
 
-			Station *st = Station::GetByTile(cur_tile);
+			StationID sid = GetStationIndex(cur_tile);
+			/* Stop early if we met the same station again. */
+			if (sid == last) continue;
+			last = sid;
+
+			Station *st = Station::GetIfValid(sid);
 			/* st can be NULL in case of waypoints */
 			if (st == NULL) continue;