module AST::Processor::Mixin

so an optimization may be warranted.
This is the second most inefficient call in the compilation phase

processor.
operations and method existence check by caching them inside a
call to node.to_ast) and it tries to optimize away the string
This patch to #process removes a bit of dynamic abilities (removed

def process(node)
  return if node.nil?
  @_on_handler_cache ||= {}
  type = node.type
  on_handler = @_on_handler_cache[type] ||= begin
    handler = :"on_#{type}"
    handler = :handler_missing unless respond_to?(handler)
    handler
  end
  send(on_handler, node) || node
end