set vs hash

bench.rb

require 'benchmark/ips'
require 'set'


set = Set[:$or, :$and, :$nor]
array = %i($or $and $nor)

Benchmark.ips do |x|
x.config(:time => 10, :warmup => 2)

  x.report('set') do |times|
    i = 0
    while i < times
      set.include? :$nor
      set.include? :$other
      i+= 1
    end
  end

  x.report('array') do |times|
    i = 0
    while i < times
      array.include? :$nor
      array.include? :$other
      i+= 1
    end
  end
   x.compare!
end

results

Calculating -------------------------------------
                 set   130.162k i/100ms
               array   133.122k i/100ms
-------------------------------------------------
                 set      7.128M (± 5.3%) i/s -     71.068M
               array      7.891M (± 5.0%) i/s -     78.675M

Comparison:
               array:  7890818.8 i/s
                 set:  7128395.4 i/s - 1.11x slower