each-push-vs-map.cr

require "benchmark"
puts Crystal::DESCRIPTION

ARRAY = (1..100).to_a

def slow
  array = [] of Int32
  ARRAY.each { |i| array.push i }
end

def fast
  ARRAY.map { |i| i }
end

Benchmark.ips do |x|
  x.report("Array#each + push") { slow }
  x.report("Array#map") { fast }
end