Changeset 839fd68 in sasmodels for sasmodels/custom/__init__.py

Timestamp:

Sep 17, 2018 2:33:16 PM (6 years ago)

Author:

Paul Kienzle <pkienzle@…>

Branches:

master, core_shell_microgels, magnetic_model, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests

Children:

91bd550

Parents:

2c12061

Message:

cache modules by timestamp in the custom kernel loader

File:

• sasmodels/custom/__init__.py (modified) (1 diff)

sasmodels/custom/__init__.py

@@ -37 +37 @@
         return module
 
+_MODULE_CACHE = {}
 def load_custom_kernel_module(path):
     """load SAS kernel from *path* as *sasmodels.custom.modelname*"""
     # Pull off the last .ext if it exists; there may be others
     name = basename(splitext(path)[0])
-    # Placing the model in the 'sasmodels.custom' name space.
-    kernel_module = load_module_from_path('sasmodels.custom.'+name,
-                                          os.path.expanduser(path))
-    return kernel_module
+    path = os.path.expanduser(path)
+    timestamp = os.path.getmtime(path)
+    module, cache_time = _MODULE_CACHE.get(path, (None, -1))
+    if cache_time < timestamp:
+        # Placing the model in the 'sasmodels.custom' name space.
+        module = load_module_from_path('sasmodels.custom.'+name, path)
+        _MODULE_CACHE[path] = module, timestamp
+
+    return module