add scipy.linalg.svd for faster SVD calculations

gstlal-inspiral/python/cbc_template_fir.py

@@ -64,7 +64,7 @@ import lalsimulation as lalsim
 
 
 from gstlal import spawaveform
-
+from scipy.linalg import svd as scipy_svd
 
 from gstlal import chirptime
 from gstlal import kernels
@@ -506,7 +506,11 @@ def decompose_templates(template_bank, tolerance, identity = False):
 	# S.V.D.
 	#
 
-	U, s, Vh = spawaveform.svd(template_bank.T,mod=True,inplace=True)
+	try:
+		U, s, Vh = scipy_svd(template_bank.T)
+	except numpy.linalg.LinAlgError as e:
+		U, s, Vh = spawaveform.svd(template_bank.T,mod=True,inplace=True)
+		print ("Falling back on spawaveform", e, file=sys.stderr)
 
 	#
 	# determine component count