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Re: bug#3269: 23.0.93; C-mode text highlighting

From: Jim Meyering
Subject: Re: bug#3269: 23.0.93; C-mode text highlighting
Date: Wed, 20 May 2009 12:31:45 +0200


Following up to this message,


I've included the trivially-rebased patch below, with a fixed log entry.
Also, have you considered offering XZ-compressed tarballs?
The decrease in size is striking:

    34M     emacs-23.0.93.tar.bz2
    26M     emacs-23.0.93.tar.xz

In addition, unpacking with xz takes about 1/3 the time, here:

    $ env time tar xf ../.new/emacs-23.0.93.tar.xz
    2.55user 0.83system 0:03.40elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
    0inputs+309000outputs (0major+17044minor)pagefaults 0swaps
    $ rm -rf emacs-23.0.93
    $ env time tar xf ../emacs-23.0.93.tar.bz2
    5.36user 0.83system 0:09.64elapsed 64%CPU (0avgtext+0avgdata 0maxresident)k
    67912inputs+309000outputs (0major+1448minor)pagefaults 0swaps

I admit that when I first compressed with xz, the resulting size was
27MiB, but when I reordered files in the tarball (placing like suffixes
together), xz was able to compress to one full MiB smaller.

>From faa98d33239195f42c732f8886f1db378846553c Mon Sep 17 00:00:00 2001
From: Jim Meyering <address@hidden>
Date: Mon, 18 May 2009 11:33:03 +0200
Subject: [PATCH] automatically handle .xz suffix (XZ-compressed files), too

* jka-cmpr-hook.el (jka-compr-compression-info-list): Add xz.
XZ is the successor to LZMA: <http://tukaani.org/xz/>
 lisp/jka-cmpr-hook.el |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/lisp/jka-cmpr-hook.el b/lisp/jka-cmpr-hook.el
index 96e9513..fa2fd40 100644
--- a/lisp/jka-cmpr-hook.el
+++ b/lisp/jka-cmpr-hook.el
@@ -219,6 +219,10 @@ options through Custom does this automatically."
      "compressing"        "gzip"         ("-c" "-q")
      "uncompressing"      "gzip"         ("-c" "-q" "-d")
      t t "\037\213"]
+    ["\\.xz\\(~\\|\\.~[0-9]+~\\)?\\'"
+     "XZ compressing"     "xz"           ("-c" "-q")
+     "XZ uncompressing"   "xz"           ("-c" "-q" "-d")
+     t t "\3757zXZ\0"]
     ;; dzip is gzip with random access.  Its compression program can't
     ;; read/write stdin/out, so .dz files can only be viewed without
     ;; saving, having their contents decompressed with gzip.

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