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bug#44674: 28.0.50; Adding current-cpu-time for performance tests
From: |
Eli Zaretskii |
Subject: |
bug#44674: 28.0.50; Adding current-cpu-time for performance tests |
Date: |
Mon, 16 Nov 2020 19:28:24 +0200 |
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Eli Zaretskii <eliz@gnu.org>, 44674@debbugs.gnu.org, Philipp Stephani
> <p.stephani2@gmail.com>
> Date: Mon, 16 Nov 2020 10:27:29 -0500
>
> > AFAIU, using 'clock' here is not the best idea, as there are caveats wrt to
> > calling 'system', and the origin of the returned value is not well defined
> > to be portable.
>
> What do you mean by "origin" and by "calling 'system'"?
Quoting https://pubs.opengroup.org/onlinepubs/9699919799/:
The clock() function shall return the implementation's best
approximation to the processor time used by the process
since the beginning of an implementation-defined era
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
related only to the process invocation.
How do you write portable Lisp code that returns consistent results
based on such shaky foundations?
- bug#44674: 28.0.50; Adding current-cpu-time for performance tests, (continued)
bug#44674: 28.0.50; Adding current-cpu-time for performance tests, Mattias Engdegård, 2020/11/16
bug#44674: 28.0.50; Adding current-cpu-time for performance tests, Stefan Monnier, 2020/11/16
bug#44674: 28.0.50; Adding current-cpu-time for performance tests, Stefan Monnier, 2020/11/16
bug#44674: 28.0.50; Adding current-cpu-time for performance tests, Eli Zaretskii, 2020/11/16
bug#44674: 28.0.50; Adding current-cpu-time for performance tests, Philipp Stephani, 2020/11/16
bug#44674: 28.0.50; Adding current-cpu-time for performance tests, Eli Zaretskii, 2020/11/16
bug#44674: 28.0.50; Adding current-cpu-time for performance tests, Stefan Monnier, 2020/11/16
bug#44674: 28.0.50; Adding current-cpu-time for performance tests, Stefan Monnier, 2020/11/16
bug#44674: 28.0.50; Adding current-cpu-time for performance tests, Philipp Stephani, 2020/11/16