[Bug 13082] New: [REQ] Hardware / SSE based MD5 operations

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[Bug 13082] New: [REQ] Hardware / SSE based MD5 operations

Samba - rsync mailing list
https://bugzilla.samba.org/show_bug.cgi?id=13082

            Bug ID: 13082
           Summary: [REQ] Hardware / SSE based MD5 operations
           Product: rsync
           Version: 3.1.3
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5
         Component: core
          Assignee: [hidden email]
          Reporter: [hidden email]
        QA Contact: [hidden email]

Hi,

I made some performance tests and ses that rsync can be a bottleneck while it
is calculating hashes of basis files (not a surprise).

For example, while I can read a big test file directly from the storage at 300
MB/s, rsync checksums it at about 200 MB/s.

Thus impact of calculating hashes for big files can be quite important (some
minutes for files of several hundreds of GB).

Then, what about MD5 implementation based on SSE ?
Do you think we would have a performance improvement ?

Thank you !

Ben

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