Added django memoize to improve performance

README.md

@@ -67,4 +67,14 @@ pip install -r requirements_test.txt
 python setup.py install
 cd tests
 python manage.py test
-```
+```
+
+## Cache Backend
+If you want to use a cache for the session store, you can install [django-memoize](https://pythonhosted.org/django-memoize/) and add `'memoize'` to `INSTALLED_APPS`.
+
+Then you need to use ``CachedMultiTokenAuthentication`` instead of ``MultiTokenAuthentication``.
+
+```bash
+pip install django-memoize
+```
+

django_rest_multitokenauth/coreauthentication.py

@@ -7,6 +7,14 @@
 
 from django_rest_multitokenauth.models import MultiToken
 
+# try to import memoize
+memoize = None
+
+try:
+    from memoize import memoize
+except ImportError:
+    pass
+
 
 class MultiTokenAuthentication(TokenAuthentication):
     """
@@ -23,3 +31,17 @@ def get_model(self):
         if self.model is not None:
             return self.model
         return MultiToken
+
+
+# if memoize is available, create a cached multi token authentication class, which uses redis as a cache
+if memoize:
+    class CachedMultiTokenAuthentication(MultiTokenAuthentication):
+        """
+        Cached MultiTokenAuthentication, using django-memoize
+        """
+        @memoize(timeout=60)
+        def authenticate_credentials(self, key):
+            return super(CachedMultiTokenAuthentication, self).authenticate_credentials(key)
+
+        def __repr__(self):
+            return self.__class__.__name__

setup.py

@@ -10,7 +10,7 @@
 
 setup(
     name='django-rest-multitokenauth',
-    version='1.0.0',
+    version='1.1.0',
     packages=find_packages(),
     include_package_data=True,
     license='BSD License',