Benchmark jsonapi-render patch

bench_jsonapi-render-patch.md

$ git checkout master

$ bundle exec ruby test_jsonapi.rb

Warming up --------------------------------------
              10_000     1.000  i/100ms
Calculating -------------------------------------
              10_000      9.795  (±10.2%) i/s -     49.000  in   5.023501s

$ git checkout optimize-resource-processor

$ bundle exec ruby test_jsonapi.rb

Warming up --------------------------------------
              10_000     1.000  i/100ms
Calculating -------------------------------------
              10_000     12.998  (± 0.0%) i/s -     65.000  in   5.006506s

12.998 / 9.795 = 1.327003573251659

--> ~30% speedup

test_jsonapi.rb

require 'benchmark'
require 'benchmark/ips'
require 'jsonapi/renderer'

# Mock class to isolate benchmark
class Test < Hash
  def jsonapi_type
    :test
  end

  def jsonapi_id
    self.object_id
  end

  def jsonapi_related(included_relationships)
    []
  end

  def as_jsonapi(options = {})
    { id: jsonapi_id, type: jsonapi_type, attributes: { foo: 'bar' } }
  end
end

data = []; 10_000.times { |o| data << Test.new }; data.size
Benchmark.ips do |x|
  x.report('10_000') do
    JSONAPI.render(data: data)
  end
end