Re: MPS: weak hash tables

[Pip Cet]

On Sunday, July 7th, 2024 at 04:27, Gerd Möllmann <gerd.moellmann@gmail.com> 
wrote:
> Ihor Radchenko yantar92@posteo.net writes:
> > Gerd Möllmann gerd.moellmann@gmail.com writes:
> > 
> > > So, we had 14 * 64M total before, and 16 * 64M afterwards. A bit more
> > > makes sense since we now have GMP objects, but a dramatic improvement?
> > > ...
> > > 
> > > That's the only thing I can come up with ATM. Complete guesswork, of
> > > course. I wonder how one would find an "optimal" configuration at all.
> > 
> > I feel kind of silly, but
> > https://memory-pool-system.readthedocs.io/en/latest/guide/perf.html
> > maybe? It has an example of "dramatic improvement".
> 
> Interestingly, the 3 gens have the opposite effect with the Helmut showed.
> 
> master passed 27/54 ert-test-run-tests-batch-expensive (5.857224 sec)
> 2-gen passed 27/54 ert-test-run-tests-batch-expensive (80.113908 sec)
> 3-gen passed 27/54 ert-test-run-tests-batch-expensive (142.356406 sec)

I'm confused by that test. I see similar results to you when I "make 
lisp/emacs-lisp/ert-tests", but when I run the test directly it finishes 
quickly:

$ ../src/emacs -Q --batch -f igc--collect -l lisp/emacs-lisp/ert-tests.el 
--eval '(ert-run-tests-batch-and-exit "ert-test-run-tests-batch-expensive")'

Running 1 tests (2024-07-07 06:00:57-0000, selector 
‘"ert-test-run-tests-batch-expensive"’)
   passed  1/1  ert-test-run-tests-batch-expensive (1.079868 sec)

Ran 1 tests, 1 results as expected, 0 unexpected (2024-07-07 06:00:58-0000, 
1.080000 sec)


What's going on here?

Pip