1 files changed, 74 insertions, 0 deletions
diff --git a/bench/lvars-gvars.py b/bench/lvars-gvars.py
new file mode 100644
index 00000000..efcef2ad
--- /dev/null
+++ b/bench/lvars-gvars.py
@@ -0,0 +1,74 @@
+# __COPYRIGHT__
+#
+# Functions and data for timing different idioms for fetching a keyword
+# value from a pair of dictionaries for localand global values.  This was
+# used to select how to most efficiently expand single $KEYWORD strings
+# in src/engine/SCons/Subst.py.
+
+def Func1(var, gvars, lvars):
+    """lvars try:-except:, gvars try:-except:"""
+    for i in IterationList:
+        try:
+            x = lvars[var]
+        except KeyError:
+            try:
+                x = gvars[var]
+            except KeyError:
+                x = ''
+
+def Func2(var, gvars, lvars):
+    """lvars has_key(), gvars try:-except:"""
+    for i in IterationList:
+        if lvars.has_key(var):
+            x = lvars[var]
+        else:
+            try:
+                x = gvars[var]
+            except KeyError:
+                x = ''
+
+def Func3(var, gvars, lvars):
+    """lvars has_key(), gvars has_key()"""
+    for i in IterationList:
+        if lvars.has_key(var):
+            x = lvars[var]
+        elif gvars.has_key(var):
+            x = gvars[var]
+        else:
+            x = ''
+
+def Func4(var, gvars, lvars):
+    """eval()"""
+    for i in IterationList:
+        try:
+            x = eval(var, gvars, lvars)
+        except NameError:
+            x = ''
+
+# Data to pass to the functions on each run.  Each entry is a
+# three-element tuple:
+#
+#   (
+#       "Label to print describing this data run",
+#       ('positional', 'arguments'),
+#       {'keyword' : 'arguments'},
+#   ),
+
+Data = [
+    (
+        "Neither in gvars or lvars",
+        ('x', {}, {}),
+        {},
+    ),
+    (
+        "Missing from lvars, found in gvars",
+        ('x', {'x':1}, {}),
+        {},
+    ),
+    (
+        "Found in lvars",
+        ('x', {'x':1}, {'x':2}),
+        {},
+    ),
+]
+