sym_vs_string.rb

require 'benchmark/ips'
require 'securerandom'

strings = []
500.times { strings << SecureRandom.uuid }

string_hash = Hash[strings.zip]
sym_hash = Hash[strings.map(&:to_sym).zip]

string_key = strings[250]
sym_key = strings[250].to_sym

Benchmark.ips do |x|
  x.report('strings') do
    string_hash[string_key]
  end

  x.report('syms') do
    sym_hash[sym_key]
  end

  x.report('string to sym') do
    sym_hash[string_key.to_sym]
  end
end