On 18.06.24 07:47, Andrey M. Borodin wrote:
On 19 Mar 2024, at 13:28, Peter Eisentraut <pe...@eisentraut.org> wrote:
I feel that we don't actually have any information about this portability
concern. Does anyone know what precision we can expect from gettimeofday()?
Can we expect the full microsecond precision usually?
At PGConf.dev Hannu Krossing draw attention to pg_test_timing module. I’ve
tried this module(slightly modified to measure nanoseconds) on some systems,
and everywhere I found ~100ns resolution (95% of ticks fall into 64ns and 128ns
buckets).
AFAICT, pg_test_timing doesn't use gettimeofday(), so this doesn't
really address the original question.
