Re: MPS: optimized build

[Andrea Corallo <acorallo@gnu.org>]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

> I'm using an optimized build of scratch/igc today, in an attempt to
> somehow distract myself from my sciatica. And I thought, why not write
> someting about what I'm seeing. Who knows for what it's good.
>
> This is of course macOS 14, Apple silicon.
>
> So, anecdotal observations:
>
> Survival time so far 1 hour, no crash. "Normal" usage for me, packages
> I use and so on... YMMV.
>
> I find build times surprising. 1:08 minutes with MPS (the non-debug
> version), 1:18 without MPS. I would have expected the opposite, and with
> a large difference. So much to intuition when it comes to performance,
> but that only in passing.
>
> Interactive use is, let me say, agreeable? :-)
>
> I still see pauses sometimes but I would say these are not caused by
> GC. I can see GC running BTW, with garbage-collection-messages set to
> t and I've changed igc.c to write the messages to *Messages* to have a
> better overview. So, synchronous process interaction, JSON parsing and
> what else lead to some small pauses. No surprise.
>
> In general, but I guess the wish is the father of the thought as we say
> here, Emacs seems to be, hm, snappier? Consult, vertico, corfu, ...
> completions, even typing text maybe?
>
> Would be interesting to hear from others how they perceive it...


Cool!

If you are there you might want to have a run with elisp-benchmarks [1].
IIRC one or two were GC bounded so we might see some difference 😃.

Thanks

  Andrea

[1] <https://elpa.gnu.org/packages/elisp-benchmarks.html>