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Re: Zipped image file

From: Paul Eggert
Subject: Re: Zipped image file
Date: Sat, 7 Sep 2019 10:15:29 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

On 9/7/19 7:36 AM, Stefan Monnier wrote:
is there
a good reason to bzip-compress a .png file?

Although typically bzip2 doesn't compress .png files well, there are counterexamples such as the attached contrived file which has an 878:1 compression ratio.

PS. Watch out, it's a torture-test image. If you uncompress it and view it, older versions of Emacs will crash and newer versions show only a placeholder box, ImagickMagick's "display" program dumps core, Firefox displays it only at lower resolution while chewing up CPU, etc.)

Attachment: s.png.bz2
Description: application/bzip

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