From bff7c9683442a6297bda2fb1ebedf73c9e4a265f Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Thu, 3 May 2012 01:44:59 +0200
Subject: Issue #14687: Optimize str%tuple for the "%(name)s" syntax

Avoid an useless and expensive call to PyUnicode_READ().
---
 Objects/unicodeobject.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index cf0bab9..e22fcfd 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -13737,9 +13737,10 @@ PyUnicode_Format(PyObject *format, PyObject *args)
                 keystart = fmtpos;
                 /* Skip over balanced parentheses */
                 while (pcount > 0 && --fmtcnt >= 0) {
-                    if (PyUnicode_READ(fmtkind, fmt, fmtpos) == ')')
+                    c = PyUnicode_READ(fmtkind, fmt, fmtpos);
+                    if (c == ')')
                         --pcount;
-                    else if (PyUnicode_READ(fmtkind, fmt, fmtpos) == '(')
+                    else if (c == '(')
                         ++pcount;
                     fmtpos++;
                 }
-- 
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