You are using the Constant Ranking Method if you specify the "ranking_method" named argument of a Marpa recognizer, with the value "constant". If you're not using the Constant Ranking Method, you can stop reading here.

Marpa::XS 0.008000 is the last release that will support the Constant Ranking Method. In future releases of Marpa, Marpa::PP, and Marpa::XS, the Constant Ranking Method may be removed. At a minimum, it will behave differently at the interface level.

Marpa is alpha but previously, whenever I've changed t…

Marpa::XS 0.008000. With this release the core Marpa algorithm has been converted to C, vastly speeding it up. Marpa::XS is still alpha, but the additional development needed at this point is a matter of packaging (See Note 1).

It is my hope that Marpa will become the standard parsing algorithm for problems too big for regular expressions.

• Marpa parses all classes of grammar that are currently in practical use in linear time. (See Note 2).
• Marpa is a general…