diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index 8c7f0205de7d..56c99d9b3ec1 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -4273,13 +4273,18 @@ def hexbin(self, x, y, C=None, gridsize=100, bins=None,
lattice1 = np.zeros((nx1, ny1))
lattice2 = np.zeros((nx2, ny2))
- for i in xrange(len(x)):
- if bdist[i]:
- if 0 <= ix1[i] < nx1 and 0 <= iy1[i] < ny1:
- lattice1[ix1[i], iy1[i]] += 1
- else:
- if 0 <= ix2[i] < nx2 and 0 <= iy2[i] < ny2:
- lattice2[ix2[i], iy2[i]] += 1
+ cond1 = (0 <= ix1) * (ix1 < nx1) * (0 <= iy1) * (iy1 < ny1)
+ cond2 = (0 <= ix2) * (ix2 < nx2) * (0 <= iy2) * (iy2 < ny2)
+
+ cond1 *= bdist
+ cond2 *= np.logical_not(bdist)
+ ix1, iy1 = ix1[cond1], iy1[cond1]
+ ix2, iy2 = ix2[cond2], iy2[cond2]
+
+ for ix, iy in zip(ix1, iy1):
+ lattice1[ix, iy] += 1
+ for ix, iy in zip(ix2, iy2):
+ lattice2[ix, iy] += 1
# threshold
if mincnt is not None:
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