[Bug 2888] New: Consider adding other compression schemes (lz4, zstd)

bugzilla-daemon at bugzilla.mindrot.org bugzilla-daemon at bugzilla.mindrot.org
Tue Jul 31 04:19:40 AEST 2018


            Bug ID: 2888
           Summary: Consider adding other compression schemes (lz4, zstd)
           Product: Portable OpenSSH
           Version: 7.7p1
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Miscellaneous
          Assignee: unassigned-bugs at mindrot.org
          Reporter: fabio.pedretti at unibs.it

I did some test and when enabling compression my CPU usage goes at 100%
at about 70-150Mb/s, depending on file compressibility. So it is not
very useful with a Gigabit Ethernet link.

To improve this I would propose to add other compression schemes, such
as lz4 ( https://github.com/lz4/lz4 ) or zstd (
https://github.com/facebook/zstd ).

They are order of magnitudes faster than current zlib-6 compression and
easily able to exceed Gigabit Ethernet speed.

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