Re: `looking-back' strange warning

[Stefan Monnier]

> It could be made faster

Oh yes.  But I think there are much better uses of people's time, e.g.:
- merge the concurrency branch into master ;-)
- replace the regexp engine with a non-backtracking one (if planned
  ahead, making this engine bi-directional would be easy, contrary to
  the amount of work needed to make the current code bidirectional).


        Stefan