bug#55163: 29.0.50; master 4a1f69ebca (TICKS . HZ) for current-time broke lsp-mode

[Eli Zaretskii]

> Date: Mon, 2 May 2022 16:17:38 -0700
> Cc: 55163@debbugs.gnu.org, v.pupillo@gmail.com, larsi@gnus.org
> From: Paul Eggert <eggert@cs.ucla.edu>
> 
> >>> What we have established is that Emacs apps need to be able to measure
> >>> time intervals, not that they need a monotonic clock.  Functions for
> >>> measuring time intervals can be built on functions that return
> >>> monotonic clock time, but they can also be built on other bases that
> >>> have very little with actual time stamps.
> >> What other bases would these be? Monotonic clocks are relatively
> >> portable; other methods that come to mind are not.
> > As long as such a method exists on a platform, that platform can make
> > do without high-resolution wallclock time.
> 
> Sorry, I'm still lost. What methods would these be?

For example, measuring time intervals by looking at CPU counters.

> Are they methods that one can already use in portable Elisp code?

No, because we were talking about APIs that are not yet available in
Emacs.