Modest performance improvement.

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci.sphere/trunk@32538 fe389314-cf27-0410-b35b-8c050e845b92

Former-commit-id: 5e631ecb491dc8b9ef1f0eaade320c8f53437458

1 files changed, 10 insertions, 4 deletions

diff --git a/stsci/sphere/great_circle_arc.py b/stsci/sphere/great_circle_arc.py
index 5df7aa2..59260c9 100644
--- a/stsci/sphere/great_circle_arc.py
+++ b/stsci/sphere/great_circle_arc.py
@@ -84,11 +84,11 @@ def _fast_cross(a, b):
     return cp
 
 
-def _cross_and_normalize(A, B):
-    if HAS_C_UFUNCS:
-        with np.errstate(invalid='ignore'):
-            return math_util.cross_and_norm(A, B)
+if HAS_C_UFUNCS:
+    _fast_cross = math_util.cross
+
 
+def _cross_and_normalize(A, B):
     T = _fast_cross(A, B)
     # Normalization
     l = np.sqrt(np.sum(T ** 2, axis=-1))
@@ -99,6 +99,12 @@ def _cross_and_normalize(A, B):
     return TN
 
 
+if HAS_C_UFUNCS:
+    def _cross_and_normalize(A, B):
+        with np.errstate(invalid='ignore'):
+            return math_util.cross_and_norm(A, B)
+
+
 def intersection(A, B, C, D):
     r"""
     Returns the point of intersection between two great circle arcs.