modules that can parse many different date/time strings

These modules can parse ISO 8601 dates, but possibly RFC 3339 and other random human-written dates as well.

usually must be given only a date/time string

• Date::Parse — river stage 4, favorited by 26 accounts ("what is a river stage?")
• DateTime::Format::Natural — river stage 3, favorited by 18 accounts
• Date::Manip — river stage 3, favorited by 17 accounts
  • Date::Manip::Date's parse(), parse_date(), and parse_time()
• Time::ParseDate — river stage 2, favorited by 3 accounts

can parse a date/time that's at the very beginning of the string, but it can tolerate non-date/time text at the end

• Date::Manip::DM5's ParseDate()
• Time::ParseDate includes the option FUZZY that allows it to disregard appended non-date/time text

can parse a date/time that has non-date/time text at both the beginning and end

• DateTime::Format::Natural's extract_datetime()
  • This is quite slow, averaging 110 to 125 milliseconds per call, on a ~60 character string. The code is found within DateTime::Format::Natural::Extract, and it seems somewhat complex. This might be okay, depending on your application, but I was hoping to find a fast (regex-based?) parser.