Ruby benchmark script to test which way is faster to merge two arrays: Array + Array or Array << Entry

bench.rb

require 'benchmark'

def array_plus_array(n)
  result = []
  n.times do |i|
    result = result + [i]
  end
  result
end

def array_shovel(n)
  result = []
  n.times do |i|
    result << i
  end
  result
end

def run_benchmark(n)
  Benchmark.bm(15) do |x|
    x.report("Array + Array:") { array_plus_array(n) }
    x.report("Array << Entry:") { array_shovel(n) }
  end
end

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

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

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