id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12248	boost::log::attributes:timer accuracy shift	tib	Andrey Semashev	"In the attached example, I have a timer and a clock attached to the log events. In the formatting function, I compute an estimated time value based on the timer and the timer creation datetime.
I then compare that estimated time and the clock of the log event. It looks like there is a increasing shift (~25ms for 1 seconds of constant logging).
In the example I wrote a timer that doesn't show this behavior and stays synchronized with the clock.

Output example:
{{{
clock: 2016-06-02T11:31:39.790105 timer1: 2016-06-02T11:31:39.765871 diff1: 24ms timer2: 2016-06-02T11:31:39.790219 diff2: 0ms 
clock: 2016-06-02T11:31:39.790105 timer1: 2016-06-02T11:31:39.765889 diff1: 24ms timer2: 2016-06-02T11:31:39.790238 diff2: 0ms 
clock: 2016-06-02T11:31:39.790105 timer1: 2016-06-02T11:31:39.765907 diff1: 24ms timer2: 2016-06-02T11:31:39.790257 diff2: 0ms 
}}}
"	Bugs	closed	To Be Determined	log	Boost 1.61.0	Problem	invalid	log timer