I'd like to figure out where the memory consumption is. I feel like we could do a better job reducing the cold start memory footprint.

I've done some stuff with routes, but I feel there are other wins we could get. The good news is we have `ObjectSpace.memsize_of_all`:

    irb(main):001:0> require 'objspace'
    => true
    irb(main):002:0> ObjectSpace.memsize_of_all(String)
    => 169318
    irb(main):003:0> x = 'x' * 1024; nil
    => nil
    irb(main):004:0> ObjectSpace.memsize_of_all(String)
    => 171817
    irb(main):005:0>

What's cool is that in MRI we can get size of the instruction sequences too:

    irb(main):005:0> ObjectSpace.memsize_of_all(RubyVM::InstructionSequence)
    => 1600800
    irb(main):006:0> 100.times { |i| eval("def x_#{i}; end") }
    => 100
    irb(main):007:0> ObjectSpace.memsize_of_all(RubyVM::InstructionSequence)
    => 1711904

Also we can see the delta between methods defined with eval vs define_method:

    irb(main):011:0> ObjectSpace.memsize_of_all(RubyVM::InstructionSequence)
    => 1717984
    irb(main):012:0> 100.times { |i| define_method("x_#{i}") { } }
    => 100
    irb(main):013:0> ObjectSpace.memsize_of_all(RubyVM::InstructionSequence)
    => 1722416

:-)

EDIT: stop saying "cool" so much. :-/