Benchmarking test of Marshal vs YAML serialise/deserialise object cloning

marshal_vs_yaml.rb

require 'benchmark'
require 'yaml'

n = 10_000
original = YAML.load <<-YML
  - column: surname
    rawtext_name: surname
    mappings:
    - field: surname
      clean: :name
  - column: forename
    rawtext_name: forenames
    mappings:
    - field: forenames
      clean: :name
  - column: sex
    rawtext_name: sex
    mappings:
    - field: sex
      clean: :sex
  - column: nhs_no
    rawtext_name: nhsnumber
    mappings:
    - field: nhsnumber
      clean: :nhsnumber
YML

Benchmark.bm do |x|
  x.report("Marshal:") do
    n.times { Marshal.load(Marshal.dump(original)) }
  end
  x.report("   YAML:") do
    n.times { YAML.load(YAML.dump(original)) }
  end
end