From 54503580e8f900de42d8b8a6de03a6aa15f3a4ed Mon Sep 17 00:00:00 2001
From: Erica Fischer <enf@felt.com>
Date: Wed, 23 Aug 2023 12:18:33 -0700
Subject: [PATCH] Don't spend memory on overzooming when we aren't going to use
 it

---
 tile-join.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tile-join.cpp b/tile-join.cpp
index 1d470c6a..d2a91534 100644
--- a/tile-join.cpp
+++ b/tile-join.cpp
@@ -495,7 +495,9 @@ struct reader {
 				tiles_at_maxzoom_so_far.clear();
 			}
 
-			tiles_at_maxzoom_so_far.push_back(std::pair<unsigned, unsigned>(x, y));
+			if (want_overzoom) {
+				tiles_at_maxzoom_so_far.push_back(std::pair<unsigned, unsigned>(x, y));
+			}
 		}
 	}