From 41fed27d0a45bd407e125e8fc805c46106573038 Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Thu, 17 Aug 2023 15:45:03 +0100
Subject: [PATCH] Animated tile: Prefetch next item in map

---
 src/animated_tile.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/animated_tile.cpp b/src/animated_tile.cpp
index 8f44022aa9..9b700252f3 100644
--- a/src/animated_tile.cpp
+++ b/src/animated_tile.cpp
@@ -17,6 +17,8 @@
 #include "date_func.h"
 #include "3rdparty/cpp-btree/btree_map.h"
 
+#include INCLUDE_FOR_PREFETCH_NTA
+
 #include "safeguards.h"
 
 /** The table/list with animated tiles. */
@@ -109,6 +111,10 @@ void AnimateAnimatedTiles()
 			continue;
 		}
 
+		auto next = iter;
+		++next;
+		if (next != _animated_tiles.end()) PREFETCH_NTA(&(next->second));
+
 		if (iter->second.speed <= max_speed) {
 			const TileIndex curr = iter->first;
 			switch (GetTileType(curr)) {
@@ -132,7 +138,7 @@ void AnimateAnimatedTiles()
 					NOT_REACHED();
 			}
 		}
-		++iter;
+		iter = next;
 	}
 }