PERF: improve MultiPoint(..) constructor from numpy array of coordina…

…te values

benchmarks/benchmarks.py

@@ -68,6 +68,12 @@ def time_linestring_from_numpy(self):
     def time_linearring_from_numpy(self):
         shapely.LinearRing(self.coords)
 
+    def test_polygon_from_numpy(self):
+        shapely.Polygon(self.coords)
+
+    def test_multipoint_from_numpy(self):
+        shapely.MultiPoint(self.coords)
+
 
 class ConstructiveSuite:
     """Benchmarks constructive functions on a set of 10,000 points"""

shapely/geometry/multipoint.py

@@ -1,5 +1,6 @@
 """Collections of points and related utilities
 """
+import numpy as np
 
 import shapely
 from shapely.errors import EmptyPartError
@@ -48,6 +49,12 @@ def __new__(self, points=None):
         elif isinstance(points, MultiPoint):
             return points
 
+        if isinstance(points, np.ndarray) and np.issubdtype(points.dtype, np.number):
+            geom = shapely.multipoints(points)
+            if not isinstance(geom, MultiPoint):
+                raise ValueError("Invalid values passed to MultiPoint constructor")
+            return geom
+
         m = len(points)
         subs = []
         for i in range(m):