From: Eli Zaretskii <eliz@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: make auto-compress-mode only listing tarballs instead of depressing
Date: Fri, 22 Feb 2019 15:17:55 +0200 [thread overview]
Message-ID: <838sy8ezcs.fsf@gnu.org> (raw)
In-Reply-To: <8736ogjgj2.fsf@gmail.com> (message from Amos Bird on Fri, 22 Feb 2019 17:53:21 +0800)
> From: Amos Bird <amosbird@gmail.com>
> Date: Fri, 22 Feb 2019 17:53:21 +0800
>
> When opening a ~40MB zip file in emacs, it takes 5 seconds to load
> the dired-like buffer.
I just tried this with a 49MB zip file, and it took me less than 2
sec. I tried a 495MB file, and it took 5.5 sec to show the listing.
Do you see those 5 sec in "emacs -Q"? If so, is your box particularly
slow?
> However, `7z l <tarball>` returns instantly. Is it possible to
> customize auto-compress-mode so that only file listing is applied
> instead of fully decompression?
If you are talking about arc-mode.el, it already decodes only the
directory part of the zip file, without uncompressing the entire
archive. It's definitely slower than 7z, because the decoding is done
in Lisp, so if we want to speed it up even further, I'd suggest to
write a module in C. However, I wonder why you see such a long time.
prev parent reply other threads:[~2019-02-22 13:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-22 9:53 make auto-compress-mode only listing tarballs instead of depressing Amos Bird
2019-02-22 13:17 ` Eli Zaretskii [this message]
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