Re: Reliable after-change-functions (via: Using incremental parsing in Emacs)

[Andrea Corallo]

Richard Copley <address@hidden> writes:

> On Sat, 4 Apr 2020 at 19:29, Andrea Corallo <address@hidden> wrote:
>
>> The fact that -Og is slower then -O0 is very sad but also interesting.
>
> Yeah. Among its other selling points, it should give "a reasonable
> level of optimization" [1].

Yep, it does not make much sense to be honest.  Just the fact you do not
spill and fill all the time every automatic variables on the stack should
give a measurable improvement.  There must be some macroscopic reason we
are missing.

> [1] https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html#index-Og
>
>> Which (I guess) GCC version are you on?
>
> GCC 9.3.0, for/on 64-bit Windows, built by MSYS2.
>
>
>> Generally speaking I suspect -Og is not very much tested, especially
>> performance wise.
>

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