Thanks, I installed the attached somewhat-fancier patches which should
do the same thing; please see what you think. Boldly closing bug#74927.From 6b65e654a74998705da3aed81d1bbb57f50847eb Mon Sep 17 00:00:00 2001
From: Paul Eggert <egg...@cs.ucla.edu>
Date: Mon, 10 Feb 2025 22:31:36 -0800
Subject: [PATCH 1/2] gzip: use pclmul if available
Suggested by Sam Russell (Bug#74192).
* bootstrap.conf (gnulib_modules): Depend on crc-x86_64, not just crc.
* NEWS, THANKS, lib/.gitignore, m4/.gitignore:
Update accordingly.
---
NEWS | 7 +++++++
THANKS | 1 +
bootstrap.conf | 2 +-
lib/.gitignore | 5 +++++
m4/.gitignore | 1 +
5 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/NEWS b/NEWS
index 417689c..e348355 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,13 @@ GNU gzip NEWS -*- outline -*-
'gzip -S' now rejects suffixes containing '/'.
[bug present since the beginning]
+** Performance improvements
+
+ gzip now decompresses significantly faster by computing CRCs via a
+ slice by 8 algorithm, and faster yet on x86-64 platforms that
+ support pclmul instructions.
+
+
* Noteworthy changes in release 1.13 (2023-08-19) [stable]
** Changes in behavior
diff --git a/THANKS b/THANKS
index a13c893..1ddfd14 100644
--- a/THANKS
+++ b/THANKS
@@ -255,6 +255,7 @@ Kai Uwe Rommel rom...@informatik.tu-muenchen.de
Paul Rubin p...@america.telebit.com
Wolfgang Rupprecht wolfg...@wsrcc.com
Rusty Russell ru...@rustcorp.com.au
+Sam Russell sam.h.rus...@gmail.com
Jonathan Ryshpan j...@amito.hitachi.com
Paul A Sand p...@unh.edu
Tony Sanders sand...@bsdi.com
diff --git a/bootstrap.conf b/bootstrap.conf
index 894adcc..a14ea4f 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -28,7 +28,7 @@ announce-gen
assert-h
calloc-gnu
close
-crc
+crc-x86_64
dirname-lgpl
fclose
fcntl
diff --git a/lib/.gitignore b/lib/.gitignore
index f76b26d..215ee91 100644
--- a/lib/.gitignore
+++ b/lib/.gitignore
@@ -14,6 +14,7 @@
/basename-lgpl.c
/basename-lgpl.h
/byteswap.c
+/byteswap.h
/byteswap.in.h
/c++defs.h
/calloc.c
@@ -26,6 +27,9 @@
/config.h
/config.hin
/crc-generate-table.c
+/crc-sliceby8.h
+/crc-x86_64-pclmul.c
+/crc-x86_64.h
/crc.c
/crc.h
/creat-safer.c
@@ -39,6 +43,7 @@
/dup.c
/dup2.c
/endian.c
+/endian.h
/endian.in.h
/errno.h
/errno.in.h
diff --git a/m4/.gitignore b/m4/.gitignore
index 7ed9d29..a2fd3ec 100644
--- a/m4/.gitignore
+++ b/m4/.gitignore
@@ -12,6 +12,7 @@
/close.m4
/closedir.m4
/codeset.m4
+/crc-x86_64.m4
/crc.m4
/dirent_h.m4
/dirfd.m4
--
2.45.2
From 0b1448fb14035ad9f18aa3c1d15935912827d571 Mon Sep 17 00:00:00 2001
From: Paul Eggert <egg...@cs.ucla.edu>
Date: Mon, 10 Feb 2025 22:44:45 -0800
Subject: [PATCH 2/2] Fix THANKS typo
---
THANKS | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/THANKS b/THANKS
index 1ddfd14..6373fea 100644
--- a/THANKS
+++ b/THANKS
@@ -255,7 +255,7 @@ Kai Uwe Rommel rom...@informatik.tu-muenchen.de
Paul Rubin p...@america.telebit.com
Wolfgang Rupprecht wolfg...@wsrcc.com
Rusty Russell ru...@rustcorp.com.au
-Sam Russell sam.h.rus...@gmail.com
+Sam Russell sam.h.russ...@gmail.com
Jonathan Ryshpan j...@amito.hitachi.com
Paul A Sand p...@unh.edu
Tony Sanders sand...@bsdi.com
--
2.45.2
