Benchmark String and Hash in Ruby

string_hash_benchmark.rb

require "benchmark"

precomputed_string = "Very long string value"*100
precomputed_symbol = precomputed_string.to_sym
MAP = {
  "key1" => true,
  :key2 => true,
  precomputed_string => true,
  precomputed_symbol => true
}
Benchmark.bm(20) do |x|
  x.report("string") do
    100000.times { MAP["key1"] }
  end
  x.report("symbol") do
    100000.times { MAP[:key2] }
  end
  x.report("long string/100") do
    100000.times { MAP[precomputed_string] }
  end
  x.report("long symbol") do
    100000.times { MAP[precomputed_symbol] }
  end
end