Add a reserve() to speed up geometry creation

joto · joto · commit d7a9ee2bbfc5 · 2023-01-02T17:09:00.000+01:00
diff --git a/src/geom-from-osm.cpp b/src/geom-from-osm.cpp
@@ -41,6 +41,7 @@ static bool fill_point_list(point_list_t *list,
 {
     osmium::Location last{};
 
+    list->reserve(nodes.size());
     for (auto const &node : nodes) {
         auto const loc = node.location();
         if (loc.valid() && loc != last) {

Original file line number	Diff line number	Diff line change
`@@ -41,6 +41,7 @@ static bool fill_point_list(point_list_t *list,`
`41`	`41`	`{`
`42`	`42`	`osmium::Location last{};`
`43`	`43`
	`44`	`+ list->reserve(nodes.size());`
`44`	`45`	`for (auto const &node : nodes) {`
`45`	`46`	`auto const loc = node.location();`
`46`	`47`	`if (loc.valid() && loc != last) {`