[python-dtcwt] 08/497: cache coefficients on first load

[Ghislain Vaillant]

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ghisvail-guest pushed a commit to branch debian/sid
in repository python-dtcwt.

commit 95f985eceeb94d5583540319234e914b25113cf0
Author: Rich Wareham <rjw57 at cam.ac.uk>
Date:   Tue Aug 6 16:54:24 2013 +0100

    cache coefficients on first load
---
 dtcwt/coeffs.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/dtcwt/coeffs.py b/dtcwt/coeffs.py
index 66697a7..f5b9062 100644
--- a/dtcwt/coeffs.py
+++ b/dtcwt/coeffs.py
@@ -3,9 +3,17 @@ from scipy.io import loadmat
 
 DATADIR = os.path.join(os.path.dirname(__file__), 'data')
 
+COEFF_CACHE = {}
+
 def _load_from_file(basename, varnames):
     filename = os.path.join(DATADIR, basename + '.mat')
-    mat = loadmat(filename)
+
+    try:
+        mat = COEFF_CACHE[filename]
+    except KeyError:
+        mat = loadmat(filename)
+        COEFF_CACHE[filename] = mat
+
     try:
         return tuple(mat[k] for k in varnames)
     except KeyError:

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