output

Calculating -------------------------------------
                  ==    11.195k i/100ms
                eql?    14.323k i/100ms
-------------------------------------------------
                  ==    119.132k (± 4.5%) i/s -    604.530k
                eql?    158.007k (± 3.0%) i/s -    802.088k

Comparison:
                eql?:   158006.6 i/s
                  ==:   119131.6 i/s - 1.33x slower

test.rb

require 'benchmark/ips'

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

  x.report("==") do
    a1 == a2
  end

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

  x.compare!
end