From e7e7189cfd6802d39caffb10ae02c307503b2ad1 Mon Sep 17 00:00:00 2001
From: Chris McDonough <chrism@agendaless.com>
Date: Thu, 18 Dec 2008 19:21:37 +0000
Subject: Add note about lack of lock.

---
 repoze/bfg/traversal.py | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'repoze')

diff --git a/repoze/bfg/traversal.py b/repoze/bfg/traversal.py
index f4cc25935..3c6756de1 100644
--- a/repoze/bfg/traversal.py
+++ b/repoze/bfg/traversal.py
@@ -134,6 +134,8 @@ def _urlsegment(s):
             result = _url_quote(s.encode('utf-8'))
         else:
             result = _url_quote(s)
+        # we don't need a lock to mutate _segment_cache, as the below
+        # will generate exactly one Python bytecode (STORE_SUBSCR)
         _segment_cache[s] = result
     return result
 
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