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Date:      Sun, 16 Apr 2017 18:02:52 -0700
From:      Matthew Ahrens <matt@mahrens.org>
To:        Baptiste Daroussin <bapt@freebsd.org>
Cc:        rgrimes@freebsd.org,  "src-committers@freebsd.org" <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r316978 - in head: contrib/zstd etc/mtree lib lib/libzstd share/mk usr.bin usr.bin/zstd
Message-ID:  <CAKUb7ivGOErE3Ns7C_WHXdLAyD_26jdSY4_5M0hF%2B%2BCua7CdoQ@mail.gmail.com>
In-Reply-To: <20170416073551.557czdcksdmmuz24@ivaldir.net>
References:  <201704152005.v3FK5M2j002459@repo.freebsd.org> <201704152337.v3FNb2m1014053@pdx.rh.CN85.dnsmgr.net> <20170416073551.557czdcksdmmuz24@ivaldir.net>

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On Sun, Apr 16, 2017 at 12:35 AM, Baptiste Daroussin <bapt@freebsd.org>
wrote:

>
> zstandard is the successor to lz4,


That's not my understanding.  zstandard is an improvement in every respect
over zlib (gzip), but lz4 is faster, especially at decompression[*].  If
you have data to the contrary I'd be happy to be wrong, but AFAIK, lz4 will
retain its usefulness for some time, at least for ZFS.

there are attempts to integrate zstandard in
> ZFS, Allan Jude is working on that,


That's great, I look forward to it!

--matt

[*] According to the zstandard github page, lz4 is 1.5x faster at
compression and 3x faster at decompression. https://github.com/facebook/zstd



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