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_element(array)
  result = []
  array.each do |i|
    result = result + [i]
  end
  result
end

def array_plus_array(array)
  result = []
  result = result + array
  result
end

def array_shovel(array)
  result = []
  array.each do |i|
    result << i
  end
  result
end

def array_concat(array)
  result = []
  result.concat(array)
  result
end

def run_benchmark(array)
  Benchmark.bm(15) do |x|
    x.report("Array + each:") { array_plus_array_element(array) }
    x.report("Array << Entry:") { array_shovel(array) }
    x.report("Array + Array:") { array_plus_array(array) }
    x.report("Array#concat:") { array_concat(array) }
  end
end

puts "Benchmark for small arrays (100 elements):"
small_array = 100.times.to_a
run_benchmark(small_array)

puts "\nBenchmark for medium arrays (10,000 elements):"
medium_array = 10_000.times.to_a
run_benchmark(medium_array)

puts "\nBenchmark for large arrays (100,000 elements):"
large_array = 100_000.times.to_a
run_benchmark(large_array)