[m-rev.] for post-commit review: O(n^2) to O(n log n)

[Peter Wang]

On Tue, 11 Jan 2022 14:54:20 +1100 "Zoltan Somogyi" <zoltan.somogyi at runbox.com> wrote:
> 
> 
> On Mon, 10 Jan 2022 18:22:29 +1100 (AEDT), "Zoltan Somogyi" <zoltan.somogyi at runbox.com> wrote:
> > On Mon, 10 Jan 2022 18:18:05 +1100, Peter Wang <novalazy at gmail.com> wrote:
> > > I don't understand that. Currently there is one .track_flags file per
> > > module.
> > 
> > Sorry, my bad. I was under the impression that there was one such file
> > per directory, like Mercury.options. I will fix the comment.
> 
> This is that fix. For review by Peter.

That's fine.

Peter