add microbenchmarks/exceptions_2_ubench.py

microbenchmarks/exceptions_2_ubench.py

+NUM_ITERS = 100 * 1000
+WRAPPER_DEPTH = 10
+RECURSE_DEPTH = 0
+TRACEBACK_DEPTH = 0
+
+counter = 0
+
+def gtor():
+    yield 1
+    raise Exception('bad wrong')
+    yield 2
+
+def wrapper(n=WRAPPER_DEPTH):
+    global counter
+    if n:
+        try:
+            wrapper(n-1)
+        finally:
+            counter += 1
+    else:
+        for x in gtor():
+            pass
+
+def recurser(n=RECURSE_DEPTH):
+    if n:
+        return recurser(n-1)
+    else:
+        return wrapper()
+
+def f(niters, traceback_depth=TRACEBACK_DEPTH):
+    global counter
+    if traceback_depth:
+        f(niters, traceback_depth - 1)
+    else:
+        for i in xrange(niters):
+            try:
+                recurser()
+            except Exception:
+                counter = 0
+
+f(NUM_ITERS)