git@vger.kernel.org mailing list mirror (one of many)
 help / color / mirror / code / Atom feed
From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: [PATCH 6/6] RelNotes: add more notes about PCRE in 2.14
Date: Thu, 20 Jul 2017 14:19:27 +0000	[thread overview]
Message-ID: <20170720141927.18274-7-avarab@gmail.com> (raw)
In-Reply-To: <20170720141927.18274-1-avarab@gmail.com>
In-Reply-To: <xmqq7ez6hk2y.fsf@gitster.mtv.corp.google.com>

We were missing any mention that:

 - PCRE is now faster with JIT
 - That it's now faster than the other regex backends
 - That therefore you might want to use it by default, but beware of
   the incompatible syntax.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 Documentation/RelNotes/2.14.0.txt | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Documentation/RelNotes/2.14.0.txt b/Documentation/RelNotes/2.14.0.txt
index fb6a3dba31..a6a1cb963b 100644
--- a/Documentation/RelNotes/2.14.0.txt
+++ b/Documentation/RelNotes/2.14.0.txt
@@ -88,7 +88,16 @@ UI, Workflows & Features
    learned to say "it's a pathspec" a bit more often when the syntax
    looks like so.
 
- * Update "perl-compatible regular expression" support to enable JIT.
+ * Update "perl-compatible regular expression" support to enable
+   JIT.
+
+   This makes grep.patternType=perl (and -P and --perl-regexp) much
+   faster for "git grep" and "git log", and is generally faster than
+   the system's POSIX regular expression implementation. Users
+   concerned with "git grep" performance or "git log --grep"
+   performance might want to try setting grep.patternType=perl. Note
+   that the syntax isn't compatible with git's default of
+   grep.patternType=basic.
 
  * "filter-branch" learned a pseudo filter "--setup" that can be used
    to define common functions/variables that can be used by other
-- 
2.13.2.932.g7449e964c


  parent reply	other threads:[~2017-07-20 14:19 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-13 23:43 [ANNOUNCE] Git v2.14.0-rc0 Junio C Hamano
2017-07-14 23:17 ` Ævar Arnfjörð Bjarmason
2017-07-15  4:09   ` Christian Couder
2017-07-15 10:09     ` Ævar Arnfjörð Bjarmason
2017-07-17 20:41   ` Junio C Hamano
2017-07-18 20:03     ` Junio C Hamano
2017-07-20 14:19     ` [PATCH 0/6] 2.14 RelNotes improvements Ævar Arnfjörð Bjarmason
2017-07-20 20:35       ` Junio C Hamano
2017-07-21 11:03         ` Ævar Arnfjörð Bjarmason
2017-07-20 14:19     ` [PATCH 1/6] RelNotes: mention "log: add -P as a synonym for --perl-regexp" Ævar Arnfjörð Bjarmason
2017-07-20 14:19     ` [PATCH 2/6] RelNotes: mention "log: make --regexp-ignore-case work with --perl-regexp" Ævar Arnfjörð Bjarmason
2017-07-20 14:19     ` [PATCH 3/6] RelNotes: mention "sha1dc: optionally use sha1collisiondetection as a submodule" Ævar Arnfjörð Bjarmason
2017-07-20 14:19     ` [PATCH 4/6] RelNotes: mention that PCRE v2 exposes the same syntax Ævar Arnfjörð Bjarmason
2017-07-20 15:24       ` Junio C Hamano
2017-07-20 14:19     ` [PATCH 5/6] RelNotes: remove duplicate mention of PCRE v2 Ævar Arnfjörð Bjarmason
2017-07-20 15:26       ` Junio C Hamano
2017-07-20 14:19     ` Ævar Arnfjörð Bjarmason [this message]
2017-07-20 19:11       ` [PATCH 6/6] RelNotes: add more notes about PCRE in 2.14 Junio C Hamano

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: http://vger.kernel.org/majordomo-info.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170720141927.18274-7-avarab@gmail.com \
    --to=avarab@gmail.com \
    --cc=git@vger.kernel.org \
    --cc=gitster@pobox.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://80x24.org/mirrors/git.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).