bug#46859: 28.0.50; [PATCH]: Add option to truncate long lines in xref.el

[Dmitry Gutov]

On 06.03.2021 14:49, Gregory Heytings wrote:
> > > Just tried 'exact, it works, it's slow (but not horribly slow: 1.2 
> > > seconds on that 25 MB file)
> >
> > 1.2s is pretty slow for this purpose.
>
> It is: (1) on a 25 MB file (not the typical case), (2) on a file with an 
> exotic encoding (not a typical case either).  On typical files (UTF-8 or 
> single byte encoding) the delay is not noticeable (a few milliseconds).

A few milliseconds is much better, as long as we're not too mistaken 
about the set of "typical files". Or we'd be exchanging one set of 
tradeoffs for another.