From 126d59542f89774a4c331a6a52b4c5dce4fce25e Mon Sep 17 00:00:00 2001
From: Pádraig Brady <P@draigBrady.com>
Date: Tue, 31 Aug 2010 08:38:34 +0100
Subject: join: improve performance when operating on whole lines

Following on from commit f86bb696, 01-02-2010,
"join: make -t '' operate on the whole line".
Bypassing the delimiter search in this case,
gives about an 8% performance boost.

* src/join (xfields): Don't bother looking for '\n'
in the data, which we know won't be present.
---
 src/join.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/join.c b/src/join.c
index fa18c9d06..6eaad6575 100644
--- a/src/join.c
+++ b/src/join.c
@@ -249,13 +249,13 @@ xfields (struct line *line)
   if (ptr == lim)
     return;
 
-  if (0 <= tab)
+  if (0 <= tab && tab != '\n')
     {
       char *sep;
       for (; (sep = memchr (ptr, tab, lim - ptr)) != NULL; ptr = sep + 1)
         extract_field (line, ptr, sep - ptr);
     }
-  else
+  else if (tab < 0)
     {
       /* Skip leading blanks before the first field.  */
       while (isblank (to_uchar (*ptr)))
-- 
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