Oh, OK, I see what you're talking about. No, that's not a performance issue. Named rules must
be evaluated when used, of course, since otherwise we won't know what they match, and that's the expensive part. Remembering what they matched for the duration of the match is important as well for some regex optimizations I've had batted around. (And backtracking, of course--can't backtrack over a group thing without knowing its size, but that's no different than any other variable-length element) The only potential expense is the exportation of those matches, but since parrot does copy-on-write strings, that costs about two pointer stores and two integer stores.
If that overhead is excessive, you can always nudge Larry to have non-capturing rule usage.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||