output

Calculating -------------------------------------
                 old   127.212k i/100ms
                 new   126.136k i/100ms
-------------------------------------------------
                 old      3.772M (± 8.8%) i/s -     18.573M
                 new      3.951M (± 5.8%) i/s -     19.803M

Comparison:
                 new:  3951356.5 i/s
                 old:  3771768.5 i/s - 1.05x slower

test.rb

require 'benchmark/ips'

Benchmark.ips do |x|
  a1 = Array.new(100000, Object.new)
  a2 = Array.new(100000, Object.new)

  x.report("old") do
    a1.eql? a2
  end

  x.report("new") do
    a1.new_eql? a2
  end

  x.compare!
end