From db1d1cfc7c50e5550819736dfd016722903a55f3 Mon Sep 17 00:00:00 2001
From: Ioan Ferencik <ioan.ferencik@undp.org>
Date: Thu, 13 Aug 2026 16:07:17 +0200
Subject: [PATCH] force 1 thread to avoid meme crash on WIN32

---
 rapida/connectivity/graph.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/rapida/connectivity/graph.py b/rapida/connectivity/graph.py
index e27883c..366c75c 100644
--- a/rapida/connectivity/graph.py
+++ b/rapida/connectivity/graph.py
@@ -211,6 +211,7 @@ async def compile_valhalla_graph(pbf_path: str, dst_dir: str, progress=None) ->
 
     if sys.platform == "win32":
         valhalla_conf["mjolnir"]["use_mmap"] = False
+        valhalla_conf["mjolnir"]["concurrency"] = 1