RE: Nested comments

[Mark Weaver]

> I implemented nested [* ... *] comments by the code below, but it
> turns out
> to be slow with many nestings, and I do not know why. Is there a way to
> make it faster?

I've found switching to a hand-coded loop using input() to be the fastest
way of skipping large portions of the input.  Presumably this works because
it avoids the overhead of maintaining yytext.