use set for O(1) lookups instead of list [O(n)] (#5)

trailbehind · Jan 13, 2021 · a2911ad · a2911ad
1 parent b7bce84
commit a2911ad
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/changegen/generator.py b/changegen/generator.py
@@ -37,7 +37,7 @@ def _get_way_node_map(osm, way_idlist):
     class _wayFilter(osmium.SimpleHandler):
         def __init__(self, ids):
             super(_wayFilter, self).__init__()
-            self.ids = ids
+            self.ids = set(ids)
             self.node_map = {}
 
         def way(self, w):