```ruby
require 'stringio'

def time
  start = Time.now
  yield
  puts "Elapsed: #{Time.now - start}"
end

class Object
  def to_transit(format=:json)
    sio = StringIO.new
    Transit::Writer.new(sio, format).write(self)
    sio.string
  end
end

class String
  def from_transit
    sio = StringIO.new(self)
    Transit::Reader.new(:json).read(sio)
  end
end
```

Make json optional on read
user
```ruby
require 'stringio'

def time
  start = Time.now
  yield
  puts "Elapsed: #{Time.now - start}"
end

class Object
  def to_transit(format=:json)
    sio = StringIO.new
    Transit::Writer.new(sio, format).write(self)
    sio.string
  end
end

class String
  def from_transit(format=:json)
    sio = StringIO.new(self)
    Transit::Reader.new(format).read(sio)
  end
end
```
assistant