[Bug 12755] New: [patch] Improve execution speed on Windows; with Win32 API calls

[samba-bugs at samba.org]

https://bugzilla.samba.org/show_bug.cgi?id=12755

            Bug ID: 12755
           Summary: [patch] Improve execution speed on Windows; with Win32
                    API calls
           Product: rsync
           Version: 3.1.3
          Hardware: All
                OS: Windows 10
            Status: NEW
          Severity: normal
          Priority: P5
         Component: core
          Assignee: wayned at samba.org
          Reporter: joe at benden.us
        QA Contact: rsync-qa at samba.org

Created attachment 13169
  --> https://bugzilla.samba.org/attachment.cgi?id=13169&action=edit
Improve wall-time execution speed on Windows

The attached patch improves execution speed under Windows, by sprinkled usage
of the Win32 API. The patch is against the Git repository master branch.

When compiled with MSYS or Cygwin, this patch massively improves on total wall
time of the synchronization. By utilizing the Win32 API, I was able to bypass
lots of POSIX-to-Win32 translations occurring coupled with reusing given
stat()-equivalent data returned during the file-system directory walks.

Comments, suggestions, ideas are welcomed!

-Joe

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