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wkb_reader : pre-allocate number of polygons in multi_polygon and number of geometries in geometry_collection via vector.reserce(...)

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artemp 2017-07-03 15:18:23 +02:00
parent 1f5583b433
commit 249d6cc311
1 changed files with 2 additions and 0 deletions
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2
src/wkb.cpp
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@ -354,6 +354,7 @@ private:
{
int num_polys = read_integer();
mapnik::geometry::multi_polygon<double> multi_poly;
multi_poly.reserve(num_polys);
for (int i = 0; i < num_polys; ++i)
{
pos_ += 5;
@ -366,6 +367,7 @@ private:
{
int num_geometries = read_integer();
mapnik::geometry::geometry_collection<double> collection;
collection.reserve(num_geometries);
for (int i = 0; i < num_geometries; ++i)
{
pos_ += 1; // skip byte order