case_bench.rb

require 'benchmark/ips'
require 'set'

set   = Set.new [String, Symbol, Fixnum, Bignum, TrueClass, FalseClass, NilClass]
hash  = set.each_with_object({}) do |type, hash|
          hash[type] = true
         end.freeze

values = ["", :symbol, 1, 10000000000000000000000000000000000, true, false, nil]

values.each do |value|
  puts "## value = #{ value.inspect }"

  Benchmark.ips do |x|
    x.report("set ") {|num|
      i = 0
      while i < num
        set.include?(value.class)
        i += 1
      end

    }
    x.report("hash") {|num|
      i = 0
      while i < num
        hash[value.class]
        i += 1
      end
    }

    x.report("case") {|num|
      i = 0
      while i < num
        case value
        when String, Symbol, Fixnum, Bignum, TrueClass, FalseClass, NilClass
          true
        when Array, Set
          true
        when Hash
          true
        end
        i += 1
      end
    }

    x.compare!
  end
end