From 80d21af614038a3163b1def661a5087735865395 Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <python@rcn.com>
Date: Wed, 21 Aug 2002 04:12:03 +0000
Subject: Sped ._update() method by factoring try/except out of the inner loop.
---
Lib/sets.py | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/Lib/sets.py b/Lib/sets.py
index 6245d53..bb44280 100644
--- a/Lib/sets.py
+++ b/Lib/sets.py
@@ -280,13 +280,14 @@ class BaseSet(object):
def _update(self, iterable):
# The main loop for update() and the subclass __init__() methods.
- # XXX This can be optimized a bit by first trying the loop
- # without setting up a try/except for each element.
data = self._data
value = True
- for element in iterable:
+ it = iter(iterable)
+ while True:
try:
- data[element] = value
+ for element in it:
+ data[element] = value
+ return
except TypeError:
transform = getattr(element, "_as_immutable", None)
if transform is None:
--
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