perf: another improvement in meshing speed

william-silversmith · william-silversmith · commit a7ef23e93370 · 2025-07-19T02:15:54.000-04:00
diff --git a/zi_lib/zi/mesh/marching_cubes.hpp b/zi_lib/zi/mesh/marching_cubes.hpp
@@ -288,6 +288,8 @@ class marching_cubes
                 std::size_t const sy, std::size_t const sz,
                 Tag const& order_tag)
     {
+        meshes_.reserve(sx * sy);
+
         constexpr std::array<PositionType, 8> cube_corners = {
             pack_coords(0, 0, 0), pack_coords(2, 0, 0), pack_coords(2, 0, 2),
             pack_coords(0, 0, 2), pack_coords(0, 2, 0), pack_coords(2, 2, 0),

Original file line number	Diff line number	Diff line change
`@@ -288,6 +288,8 @@ class marching_cubes`
`288`	`288`	`std::size_t const sy, std::size_t const sz,`
`289`	`289`	`Tag const& order_tag)`
`290`	`290`	`{`
	`291`	`+ meshes_.reserve(sx * sy);`
	`292`	`+`
`291`	`293`	`constexpr std::array<PositionType, 8> cube_corners = {`
`292`	`294`	`pack_coords(0, 0, 0), pack_coords(2, 0, 0), pack_coords(2, 0, 2),`
`293`	`295`	`pack_coords(0, 0, 2), pack_coords(0, 2, 0), pack_coords(2, 2, 0),`