Re: scratch/accurate-warning-pos: Solid progress: the branch now bootstraps.

[Clément Pit-Claudel]

On 26/11/2018 13.43, Alan Mackenzie wrote:
> This may be significant, but is it really important?  Most of the time,
> Emacs is waiting for the next key depression anyway.  If a batch like
> operation takes 11.5 minutes rather than 10 minutes, who would really
> notice?  Similarly if an instantaneous operation, like filling a
> paragraph increases by 15%, would anybody care?  It is surely only
> those interactive operations which are sluggish which might become more
> so, where the slowdown would be important.  How many of these really
> exist in Emacs?

This is a tricky question. Places where Emacs is too slow for my taste, and 
that I wouldn't like to see become slower, include indentation (which often 
requires many position-related operations, as well as macro editing, and syntax 
highlighting.

I do have one question: I understand why attaching positions to code fragments 
make reading the code slower, but why does it make interpreting it slower as 
well?

Another related question: this work is for warnings, but will it extend to 
having positions in backtraces?

Congrats on the had work, btw :) This would be a very useful feature to have.
Clément.