From: Andreas Rottmann <a.rottmann@gmx.at>
To: Andy Wingo <wingo@pobox.com>
Cc: guile-devel@gnu.org
Subject: Re: Take some lowhanging fruit to speed up R6RS fixnum operations
Date: Tue, 05 Apr 2011 00:00:13 +0200 [thread overview]
Message-ID: <874o6d1xua.fsf@gmx.at> (raw)
In-Reply-To: <m3r59hso47.fsf@unquote.localdomain> (Andy Wingo's message of "Mon, 04 Apr 2011 23:28:08 +0200")
Andy Wingo <wingo@pobox.com> writes:
> On Wed 30 Mar 2011 12:58, Andreas Rottmann <a.rottmann@gmx.at> writes:
>
>> "unzip" times the unzipping of a not-so-large (675KiB) ZIP file using
>> Göran Weinholts ZIP implementation.
>
> How long does the standard unix utility take, for the record?
>
On a tmpfs, with the same ZIP file:
unzip ~/public_html/tmp/bundles/xitomatl-20110103.zip 0.07s user 0.03s system 77% cpu 0.135 total
So there's quite some room for improvement. Other data points: Ikarus
runs the benchmark in 0.55 seconds, Racket v5.1.0.2 takes 2.39 seconds.
For Dorodango, I intend to refactor ZIP support to allow for different
backends, selectable at runtime, and implement a libzip binding. This
will get reasonable performance on implementations that don't have a
native-code compiler as fancy as Ikarus's.
Regards, Rotty
--
Andreas Rottmann -- <http://rotty.yi.org/>
next prev parent reply other threads:[~2011-04-04 22:00 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-22 23:20 Take some lowhanging fruit to speed up R6RS fixnum operations Andreas Rottmann
2011-03-22 23:20 ` [PATCH] " Andreas Rottmann
2011-03-24 21:51 ` Ludovic Courtès
2011-03-24 23:42 ` Andreas Rottmann
2011-03-25 12:16 ` Andreas Rottmann
2011-03-27 15:19 ` Ludovic Courtès
2011-03-27 22:20 ` Andreas Rottmann
2011-03-29 11:05 ` Andy Wingo
2011-03-30 1:37 ` Andreas Rottmann
2011-03-30 10:31 ` Andreas Rottmann
2011-03-30 10:58 ` Andreas Rottmann
2011-04-02 17:42 ` R6RS fixnum arithmetic optimizations Andreas Rottmann
2011-04-02 17:42 ` [PATCH 1/3] Add a few benchmarks for R6RS fixnum arithmetic Andreas Rottmann
2011-04-02 17:42 ` [PATCH 2/3] Several optimizations " Andreas Rottmann
2011-04-02 17:42 ` [PATCH 3/3] Add `fixnum?' VM primitive Andreas Rottmann
2011-04-04 21:53 ` Andy Wingo
2011-04-05 0:14 ` Andreas Rottmann
2011-04-06 12:42 ` define-inlinable Ludovic Courtès
2011-04-06 21:30 ` define-inlinable Andreas Rottmann
2011-04-06 22:24 ` define-inlinable Ludovic Courtès
2011-04-11 16:56 ` define-inlinable Andy Wingo
2011-04-11 20:01 ` define-inlinable Ludovic Courtès
2011-04-11 21:05 ` define-inlinable Andy Wingo
2011-04-11 22:11 ` define-inlinable Andreas Rottmann
2011-04-07 15:57 ` [PATCH 3/3] Add `fixnum?' VM primitive Ludovic Courtès
2011-04-04 21:28 ` Take some lowhanging fruit to speed up R6RS fixnum operations Andy Wingo
2011-04-04 22:00 ` Andreas Rottmann [this message]
2011-04-04 22:12 ` Andy Wingo
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