Subject: bug#17419: closed (Re: bug#17419: doc: mention several improvements for performance)

From: [email-masked] (GNU bug Tracking System)
Date: Tue, 06 May 2014 16:25:03 +0000

Your bug report

#17419: doc: mention several improvements for performance

which was filed against the grep package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
17419: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17419
GNU Bug Tracking System
Contact [email-masked] with problems

Subject: Re: bug#17419: doc: mention several improvements for performance
From: Paul Eggert <[email-masked]>
To: Norihiro Tanaka <[email-masked]>, [email-masked]
Date: Tue, 06 May 2014 09:24:22 -0700
List-Id: <debbugs-submit.debbugs.gnu.org>

Thanks, I pushed the attached patch, which also mentions a downgrade.
>From 21dad0c6ac46846fbee6eabbb736dfe87fbac508 Mon Sep 17 00:00:00 2001
From: Paul Eggert <[email-masked]>
Date: Tue, 6 May 2014 09:22:48 -0700
Subject: [PATCH] doc: mention performance changes

* NEWS: Discuss recent performance improvements and downgrades.
---
 NEWS | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/NEWS b/NEWS
index 7269d57..3a20096 100644
--- a/NEWS
+++ b/NEWS
@@ -44,6 +44,12 @@ GNU grep NEWS                                    -*- outline -*-
   'grep -i ǈ' now matches both 'Ǉ' (U+01C7 LATIN CAPITAL LETTER LJ)
   and 'ǉ' (U+01C9 LATIN SMALL LETTER LJ).
 
+** Improvements
+
+  Performance has improved, typically by 10% and in some cases by a
+  factor of 200.  However, performance of grep -P in UTF-8 locales has
+  gotten worse as part of the fix for the abovementioned crashes.
+
 
 * Noteworthy changes in release 2.18 (2014-02-20) [stable]
 
-- 
1.9.0

Subject: doc: mention several improvements for performance
From: Norihiro Tanaka <[email-masked]>
To: [email-masked]
Date: Tue, 06 May 2014 21:57:45 +0900
List-Id: <debbugs-submit.debbugs.gnu.org>

This patch adds a description about several improvements for performance
to NEWS.
From 1cb28baea51dc5caacb2f6f890a6816cdc9d84c4 Mon Sep 17 00:00:00 2001
From: Norihiro Tanaka <[email-masked]>
Date: Mon, 5 May 2014 16:58:34 +0900
Subject: [PATCH] doc: mention several improvements for performance

* NEWS (improvements): Mention several improvements for performance.
---
 NEWS | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/NEWS b/NEWS
index 7269d57..81bc486 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,12 @@ GNU grep NEWS                                    -*- outline -*-
 
 * Noteworthy changes in release ?.? (????-??-??) [?]
 
+** Improvements
+
+  grep is now faster more than 10% in most of cases and more than 200
+  times in some of special cases by the improvements more than 10 for the
+  performance.
+
 ** Bug fixes
 
   grep no longer mishandles patterns like [a-[.z.]], and no longer
-- 
1.9.2