Bug 248401

Summary:	net/rsync: Enable xxh3 and xxh128 hashes
Product:	Ports & Packages	Reporter:	dewayne
Component:	Individual Port(s)	Assignee:	Rodrigo Osorio <rodrigo>
Status:	Closed Works As Intended
Severity:	Affects Some People	Keywords:	needs-patch, needs-qa, performance
Priority:	---	Flags:	bugzilla: maintainer-feedback? (rodrigo)
Version:	Latest
Hardware:	Any
OS:	Any

Description dewayne 2020-08-01 00:16:30 UTC

Now that xxh hashes with their significant speed advantage are available and documented for rsync, I successfully performed (on FreeBSD12.1 amd64 and x86)

# rsync -AXv --cc=xxh64 /tmp/file.txt /tmp/b2/ 

YAY!
(Aside: for the reader, xxh64 is synonomous with xxhash)

but
# rsync -AXv --cc=xxh3 /tmp/file.txt /tmp/b2
unknown checksum name: xxh3
rsync error: requested action not supported (code 4) at checksum.c(86) [client=3.2.2]

and 
# rsync -AXv --cc=xxh128 /tmp/file.txt /tmp/b2
performed similarly.

As ~20% of devices are still 32bit (so would benefit from xxh3), based on the performance improvement suggested by 
https://cyan4973.github.io/xxHash/ 
we look forward to this enhancement.  And as xxh64 functions, this PR should be a low priority.  If it wasn't documented in the man page, I think rsync functions as intended ;)