bm-sym-str.rb

require "benchmark/ips"

state1 = :initial
state2 = "initial"

Benchmark.ips do |x|
  x.report("<Symbol> => (<String>, <Symbol>)") do
    case state1
    when "initial", :initial
      a = 1
    else
      a = 2
    end
  end

  x.report("<Symbol> => (<Symbol>, <String>)") do
    case state1
    when :initial, "initial"
      a = 1
    else
      a = 2
    end
  end

  x.report("<String> => (<String>, <Symbol>)") do
    case state2
    when "initial", :initial
      a = 1
    else
      a = 2
    end
  end

  x.report("<String> => (<Symbol>, <String>)") do
    case state2
    when :initial, "initial"
      a = 1
    else
      a = 2
    end
  end

  x.report("<Symbol>.to_s => (<String>, <Symbol>)") do
    case state1.to_s
    when "initial", :initial
      a = 1
    else
      a = 2
    end
  end

  x.report("<Symbol>.to_s => (<Symbol>, <String>)") do
    case state1.to_s
    when :initial, "initial"
      a = 1
    else
      a = 2
    end
  end

  x.report("<String>.to_sym => (<String>, <Symbol>)") do
    case state2.to_sym
    when "initial", :initial
      a = 1
    else
      a = 2
    end
  end

  x.report("<String>.to_sym => (<Symbol>, <String>)") do
    case state2.to_sym
    when :initial, "initial"
      a = 1
    else
      a = 2
    end
  end
end

results.txt

Calculating -------------------------------------
<Symbol> => (<String>, <Symbol>)
                         74453 i/100ms
<Symbol> => (<Symbol>, <String>)
                         72922 i/100ms
<String> => (<String>, <Symbol>)
                         69175 i/100ms
<String> => (<Symbol>, <String>)
                         69552 i/100ms
<Symbol>.to_s => (<String>, <Symbol>)
                         57608 i/100ms
<Symbol>.to_s => (<Symbol>, <String>)
                         56134 i/100ms
<String>.to_sym => (<String>, <Symbol>)
                         61364 i/100ms
<String>.to_sym => (<Symbol>, <String>)
                         60929 i/100ms
-------------------------------------------------
<Symbol> => (<String>, <Symbol>)
                      5759613.5 (±21.2%) i/s -   27249798 in   5.011084s
<Symbol> => (<Symbol>, <String>)
                      5739427.9 (±20.7%) i/s -   27272828 in   5.005634s
<String> => (<String>, <Symbol>)
                      4124374.2 (±19.2%) i/s -   19784050 in   5.011632s
<String> => (<Symbol>, <String>)
                      4136960.2 (±19.5%) i/s -   19752768 in   5.000195s
<Symbol>.to_s => (<String>, <Symbol>)
                      2675549.2 (±18.7%) i/s -   12904192 in   5.017881s
<Symbol>.to_s => (<Symbol>, <String>)
                      2656961.9 (±17.9%) i/s -   12854686 in   5.016062s
<String>.to_sym => (<String>, <Symbol>)
                      3368770.7 (±19.7%) i/s -   16138732 in   5.009987s
<String>.to_sym => (<Symbol>, <String>)
                      3422990.3 (±18.9%) i/s -   16450830 in   5.008404s