[Bug 769259] New: orc_memcpy() slower than memcpy()

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=769259

            Bug ID: 769259
           Summary: orc_memcpy() slower than memcpy()
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: orc
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: slomo at coaxion.net
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: ds at schleef.org
     GNOME version: ---

Created attachment 332264
  --> https://bugzilla.gnome.org/attachment.cgi?id=332264&action=edit
memcpy_speed.diff

With attached patch for making the memcpy performance test in orc output
something meaningful (actual size | time for one iteration with orc | with
libc), orc_memcpy() is e.g. about 35% slower than memcpy() on 5MB.

This is on Linux with a "Intel(R) Core(TM) i7-4600U CPU @ 2.10GHz" and glibc
2.22. Similar reports on Windows though.

When putting the output to a file ("data") you can plot this with gnuplot:
> plot "data" using 1:2 t "orc" with lines, "data" using 1:3 t "libc" with lines

See also attached plot from me

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