Ruby benchmark script to test which way is faster to normalize a hash: stringify_keys! or symbolize_keys!

bench.rb

require 'benchmark'
require 'active_support/core_ext/hash/keys'

def create_mixed_hash(size)
  hash = {}
  size.times do |i|
    if i.even?
      hash[i.to_s] = "value#{i}"
    else
      hash[i.to_s.to_sym] = "value#{i}"
    end
  end
  hash
end

def run_benchmark(size)
  mixed_hash = create_mixed_hash(size)

  Benchmark.bm(20) do |x|
    x.report("symbolize_keys!:") { mixed_hash.dup.symbolize_keys! }
    x.report("stringify_keys!:") { mixed_hash.dup.stringify_keys! }
  end
end

puts "Benchmark for small hash (100 elements):"
run_benchmark(100)

puts "\nBenchmark for medium hash (10,000 elements):"
run_benchmark(10_000)

puts "\nBenchmark for large hash (100,000 elements):"
run_benchmark(100_000)