require 'benchmark'

n = 1_000_000
Benchmark.bm(20) do |x|
  x.report("chained methods:") do
    n.times do
      ['coconut', 'lemon', 'banana', 'apple'].select { |e| e.size > 5 }
                                             .map { |e| e.upcase }
    end
  end

  x.report("only reduce:") do
    n.times do
      ['coconut', 'lemon', 'banana', 'apple'].reduce([]) do |acc, e|
        acc << e.upcase if e.size > 5
        acc
      end
    end
  end
end