snippet.rb

class MethodMissing
  def method_missing(name, *args)
    msg = name.to_s[/print_(.*)/, 1]
    
    print msg
  end
end

class LazyMethodDefine
  def method_missing(name, *args)
    msg = name.to_s[/print_(.*)/, 1]
    
    self.class.send(:define_method, name) do
      print msg
    end
    
    send name
  end
end

require 'benchmark'

puts Benchmark.measure { 100000.times { MethodMissing.new.print_h } }    # => 0.760000   0.130000   0.890000 (  0.890088)
puts Benchmark.measure { 100000.times { LazyMethodDefine.new.print_h } } # => 0.310000   0.100000   0.410000 (  0.413843)