Re: Some experience with the igc branch

[Óscar Fuentes]

Pip Cet via "Emacs development discussions." <emacs-devel@gnu.org>
writes:

>> I suspect that some of those
>> pauses are not related to garbage collection (executing code and moving
>> data also takes time.)
>
> Quite possible.  Even if it is GC, please keep in mind that MPS has many
> settings which you can play with, and it can improve things a lot.  It's
> not too early to become a fan of the scratch/igc branch, but it is too
> early to reject it for performance reasons.  It's a "heads you lose, tails I
> win" situation, I guess.

IIRC MPS is well documented and I can look up those settings, but does
Emacs collect the required info for taking informed decisions?

Anyway, with the setup I'm using for this job is totally unrealistic to
expect instant reaction from Emacs, there is too much heavy stuff
kicking in for every keypress.

> 1. The signal issue.  I don't have a good way to fix this and make
> everyone happy, but I do have a solution which hasn't caused a crash for
> me in quite a while.  It may be good enough.

Inevitably, a few minutes after sending my message Emacs froze after
working flawlessly since you fixed the JSON issue.

Redisplay just stopped while showing the menu, no crash nor infinite
loop, its CPU usage was typical for the repeating timers that my config
creates. Sadly, instead of attaching gdb I tried to wake up Emacs by
sending SIGUSR1 (no effect, as it is the wrong signal, should be
SIGUSR2) and then sent SINGINT by mistake, which terminated the process.

It's very likely that MPS is innocent on this, but I'm happy to apply
and test any stability improvement patch you have and wish to share.

Thanks.