OpenImageIO/oiio — pull request #479 by lgritz (2012-12-28 23:37:52+00:00)
Title: Add a unit test for Timer.

Among other things, this unit test times how expensive a Timer is.
Answer: a Timer begin/end takes about 0.3 us on my OSX laptop, around
0.07 us on a souped-up Linux workstation. YMMV on other platforms. But
use this ballpark as guidance for the granularity of which things can
safely be timed without the Timer itself making things appreciably more
expensive.