Re: emacs rendering comparisson between emacs23 and emacs26.3

[Dmitry Gutov]

On 06.04.2020 05:36, Richard Stallman wrote:
> If and when such a mechanism is in place for us free software
> activists, we might agree that open-paren-in-column-0-is-defun-start
> is not worth while any more.  But it appears that has not happened
> yet, so I think that the open-paren-in-column-0-is-defun-start guided
> heuristic IS still worth while for us.

This question (whether syntax-ppss is "too slow") was raised a couple of 
times already, but in all previous discussions, as well as in this one, 
nobody has done the bare minimum research (e.g. profiling some 
real-world scenario) to prove this claim. Nor, if it indeed showed up in 
profiler reports, examined which part of the current mechanism is the 
bottleneck. Nor tried to fix that part somehow.

This is not how we should approach performance problems.

The only arguments I see are nostalgic (e.g., somehow, Emacs was faster 
years ago, maybe? the files were smaller, and the C standard was simpler?)