FactoryGirl vs. Fixtures speed test

gistfile1.md

require "rails_helper"

describe "Speed Test" do
  it "uses fixtures" do
    10.times do
      users(:brad)
    end
  end

  it "uses FactoryGirl#create" do
    10.times do
      FactoryGirl.create(:presenter)
    end
  end

  it "uses FactoryGirl#build" do
    10.times do
      FactoryGirl.build(:presenter)
    end
  end
end

$ bundle exec rspec spec/models/speed_test_spec.rb:4
Speed Test
  uses fixtures

Finished in 3.19 seconds
1 example, 0 failures

$ bundle exec rspec spec/models/speed_test_spec.rb:10
Speed Test
  uses FactoryGirl#create

Finished in 11.07 seconds
1 example, 0 failures

$ bundle exec rspec spec/models/speed_test_spec.rb:16
Speed Test
  uses FactoryGirl#build

Finished in 3.35 seconds
1 example, 0 failures