[Bug 747959] buffer: minimize memory copy in _memory_add()

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=747959

Olivier Crête <olivier.crete at ocrete.ca> changed:

           What    |Removed                     |Added
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                 CC|                            |olivier.crete at ocrete.ca

--- Comment #7 from Olivier Crête <olivier.crete at ocrete.ca> ---
I'm not convinced having an array of hundreds of GstMemory is a good idea. The
cost of creating and destroying all of those memories may exceed the benefit of
the zero-copy. I think this is why Wim limited it to relatively small value in
the first place. Possibly, you may want to benchmark your patch against just
allocation a large buffer and doing memcpy() into it?

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