output

Calculating -------------------------------------
                 old   317.000  i/100ms
                 new    14.732k i/100ms
-------------------------------------------------
                 old      3.189k (± 3.4%) i/s -     16.167k
                 new    158.659k (± 3.1%) i/s -    795.528k

Comparison:
                 new:   158658.9 i/s
                 old:     3189.4 i/s - 49.75x slower

test.rb

require 'benchmark/ips'

Benchmark.ips do |x|
  a1 = (1..10000).to_a
  a2 = (1..10000).to_a

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

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

  x.compare!
end