On Tue, Jul 14, 2015 at 7:25 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> FWIW, I entirely share Robert's opinion that adding gettimeofday()
> overhead in routinely-taken paths is likely not to be acceptable.
I think that it can depend on many factors. For example, the
availability of vDSO support on Linux/glibc.
I've heard that clock_gettime() with CLOCK_REALTIME_COARSE, or with
CLOCK_MONOTONIC_COARSE can have significantly lower overhead than
gettimeofday().
--
Peter Geoghegan
