[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [39549] trunk/blender/source/blender/ python/intern/bpy_rna.c: minor speedup to python/ rna api keyword argument lookups.

[Campbell Barton]

Revision: 39549
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=39549
Author:   campbellbarton
Date:     2011-08-19 10:38:34 +0000 (Fri, 19 Aug 2011)
Log Message:
-----------
minor speedup to python/rna api keyword argument lookups.
- dont use hash lookups in this case because converting the string to unicode and doing a hash lookup is slower then looping over the keys and comparing (which avoids creating and throwning away a unicode string).

Modified Paths:
--------------
    trunk/blender/source/blender/python/intern/bpy_rna.c

Modified: trunk/blender/source/blender/python/intern/bpy_rna.c
===================================================================
--- trunk/blender/source/blender/python/intern/bpy_rna.c	2011-08-19 10:35:47 UTC (rev 39548)
+++ trunk/blender/source/blender/python/intern/bpy_rna.c	2011-08-19 10:38:34 UTC (rev 39549)
@@ -4297,6 +4297,27 @@
 	return ret;
 }
 
+/* Use to replace PyDict_GetItemString() when the overhead of converting a
+ * string into a python unicode is higher than a non hash lookup.
+ * works on small dict's such as keyword args. */
+static PyObject *small_dict_get_item_string(PyObject *dict, const char *key_lookup)
+{
+	PyObject *key= NULL;
+	Py_ssize_t pos = 0;
+	PyObject *value = NULL;
+
+	/* case not, search for it in the script's global dictionary */
+	while (PyDict_Next(dict, &pos, &key, &value)) {
+		if(PyUnicode_Check(key)) {
+			if(strcmp(key_lookup, _PyUnicode_AsString(key))==0) {
+				return value;
+			}
+		}
+	}
+
+	return NULL;
+}
+
 static PyObject *pyrna_func_call(BPy_FunctionRNA *self, PyObject *args, PyObject *kw)
 {
 	/* Note, both BPy_StructRNA and BPy_PropertyRNA can be used here */
@@ -4391,7 +4412,11 @@
 			kw_arg= FALSE;
 		}
 		else if (kw != NULL) {
+#if 0
 			item= PyDict_GetItemString(kw, RNA_property_identifier(parm)); /* borrow ref */
+#else
+			item= small_dict_get_item_string(kw, RNA_property_identifier(parm)); /* borrow ref */
+#endif
 			if(item)
 				kw_tot++; /* make sure invalid keywords are not given */