Re: Exposing subsecond precision in current-seconds

[Lassi Kortela]

> > > Microseconds since epoch? Are you sure about this?
> >
> > What else would the new current-microseconds return?
>
> Since startup, or since some undefined point of time. I see no sense in using
> an absolute basetime, as such a timing command will in nearly all use cases
> be used for relative timing. One should also attempt to reduce the range to
> avoid bignum allocation, I think.

With sub-millisecond timers, it may make sense to figure out in advance 
which particular applications those timers would be used for, and then 
design a specific timing interface for each of them. 
Application-specific knowledge will probably improve the accuracy of 
timing and help select a useful precision, epoch and timing source.

One obvious application is code profiling, in which case the timer can 
be part of the profiling framework. What are some other applications?