5 Jul
2007
5 Jul
'07
11:31 p.m.
(cl-ppcre:scan "^\\[([^ ]{1,})+[ ]*(.{1,})?\\]" "foo [[Main]] [http://baz]''bold'''''''bar''''" :start 13)
This is a regular expression that does lots of backtracking when it fails. If you change that you'll most likely see a large performance improvement. A small change is to simplify the first grouping: "^\\[([^ ]{1,})[ ]*(.{1,})?\\]" The reason that having :start is so much slower is that the regex matches a different string that needs far less backtracking that without the :start. Cheers, Chris Dean