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From:   Ralph Corderoy <ralph@inputplus.co.uk>
To:     linux-man <linux-man@vger.kernel.org>, groff@gnu.org
Subject: Re: Compressed man pages
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Date:   Thu, 13 Apr 2023 11:09:51 +0100
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Hi Mingye,

> [Zstd and brotli each have a "dictionary mode" to deal with this, but
> (a) Zstd dict-file requires an extra flag on decompress (b) nobody has
> brotli, which has a default dictionary, installed.]

I found brotli was already installed here.
So here's some numbers, just for the lists' info.

    $ ls | grep '\.gz$' | shuf -n10 |
    > while read -r f; do
    >     printf '%32s  %5d  %5d\n' "$f" `wc -c <"$f"` \
    >         `zcat "$f" | brotli | wc -c`
    > done |
    > awk '{print $0 "  " $3/$2}'
			postmap.1.gz   4125   3333  0.808
	       gnutls-cli-debug.1.gz   2627   2108  0.802436
			  cwebp.1.gz   5074   4106  0.809223
			findsmb.1.gz   1810   1474  0.814365
			ppmntsc.1.gz   1282    973  0.75897
			  libuv.1.gz  76363  62274  0.8155
			  xmlwf.1.gz   3486   2760  0.791738
			  users.1.gz    763    572  0.749672
		   gpgparsemail.1.gz    294    231  0.785714
	       perl561delta.1perl.gz  51764  42957  0.829862
    $

-- 
Cheers, Ralph.