Optimization
  Filed under Development
  
  
  Here are some possible optimization techniques we can apply to
    code sections if they turn out to be slow. Be sure not to
    prematurely optimize: if you get that itch, put it here!
  
    - Make Tokens Flyweights (may prove problematic, probably not
      worth it)
- Rewrite regexps into PHP code
- Batch regexp validation (do as many per function call as
      possible)
- Parallelize strategies