[glangdale]

Jitting is a common tool that people seem to reach for whenever they are parsing or lexing anything at any time. It's really not necessary; there are plenty of fast search methods out there.

JIT approaches make a lot of sense for lex/yacc and their numerous descendants, as these typically need to put a lot of extra logic into the process of parsing. You don't need to JIT just to look up some strings and/or parse a fairly simple hierarchical structure.

[xfs]

Parsing itself doesn't need jitting but as soon as you start to use the parsed data to interface with some typed containers the data plumbing consumes much more time than parsing does and drags down all the optimization. For parsing to interact well with static languages jitting is a possible solution to look at.