benchmark.rb

benchmark.rb

require 'benchmark/ips'

puts RUBY_DESCRIPTION

hash = {foo: "bar", bar: "foo", baz: "bar", one: "five", five: "one"}
strings = ("a".."aa").to_a
symbols = strings.map(&:to_sym)

str_hash = Hash[strings.zip strings]
sym_hash = Hash[symbols.zip symbols]

Benchmark.ips do |x|
  x.config(:time => 5, :warmup => 2)

  x.report("hash[]")        { hash[:foo] }
  x.report("hash.has_key?") { hash.has_key? :foo }

  x.report("str_hash[]")        { str_hash['aq'] }
  x.report("str_hash.has_key?") { str_hash.has_key? 'aq' }

  x.report("sym_hash[]")        { sym_hash[:aq] }
  x.report("sym_hash.has_key?") { sym_hash.has_key? :aq }
end

gistfile1.txt

ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-darwin14.0]
Calculating -------------------------------------
              hash[]    116679 i/100ms
       hash.has_key?    116819 i/100ms
          str_hash[]    104410 i/100ms
   str_hash.has_key?    101510 i/100ms
          sym_hash[]    116876 i/100ms
   sym_hash.has_key?    114767 i/100ms
-------------------------------------------------
              hash[]  7277455.9 (±14.2%) i/s -   35587095 in   4.999576s
       hash.has_key?  6438265.3 (±15.4%) i/s -   31424311 in   5.004688s
          str_hash[]  3883650.1 (±13.1%) i/s -   19107030 in   5.011662s
   str_hash.has_key?  3747256.2 (±13.3%) i/s -   18474820 in   5.023986s
          sym_hash[]  6189527.6 (±16.2%) i/s -   30154008 in   5.007450s
   sym_hash.has_key?  5954672.6 (±15.2%) i/s -   29150818 in   5.013669s

rubinius 2.2.10 (2.1.0 bf61ae2e 2014-06-27 JI) [x86_64-darwin14.0.0]
Calculating -------------------------------------
              hash[]    215528 i/100ms
       hash.has_key?    274802 i/100ms
          str_hash[]    284426 i/100ms
   str_hash.has_key?    285994 i/100ms
          sym_hash[]    308111 i/100ms
   sym_hash.has_key?    317849 i/100ms
-------------------------------------------------
              hash[]  5245826.8 (±12.0%) i/s -   25863360 in   5.020344s
       hash.has_key?  3920295.2 (±16.5%) i/s -   18961338 in   4.995880s
          str_hash[]  4439750.5 (±6.8%) i/s -   22185228 in   5.021374s
   str_hash.has_key?  4844793.1 (±7.5%) i/s -   24309490 in   5.046094s
          sym_hash[]  5747593.2 (±7.5%) i/s -   28654323 in   5.017890s
   sym_hash.has_key?  6226543.1 (±5.5%) i/s -   31149202 in   5.018689s
   
jruby 1.7.13 (1.9.3p392) 2014-06-24 43f133c on Java HotSpot(TM) 64-Bit Server VM 1.7.0_67-b01 [darwin-x86_64]
Calculating -------------------------------------
              hash[]    168115 i/100ms
       hash.has_key?    228017 i/100ms
          str_hash[]    197915 i/100ms
   str_hash.has_key?    225676 i/100ms
          sym_hash[]    216706 i/100ms
   sym_hash.has_key?    227773 i/100ms
-------------------------------------------------
              hash[] 13373023.5 (±15.8%) i/s -   64724275 in   4.977000s
       hash.has_key? 13733368.8 (±14.3%) i/s -   67036998 in   4.986000s
          str_hash[]  9787290.4 (±13.3%) i/s -   47895430 in   4.986000s
   str_hash.has_key? 10548284.1 (±14.2%) i/s -   51679804 in   5.012000s
          sym_hash[] 10999724.0 (±14.7%) i/s -   53743088 in   5.005000s
   sym_hash.has_key? 11938579.8 (±15.1%) i/s -   58309888 in   5.004000s