Simple fibonnaci benchmark written in Ruby. To help established based line..

fib.rb

# simple fibonnaci benchmark 
#
require 'benchmark'

def fib(n)
 if n == 1
  1
 elsif n == 2
  1
 else
  fib(n-1) + fib(n-2)
 end
end

# complexity
N = 38

puts "ruby version: #{RUBY_VERSION}"

if `uname` =~ /Linux/
  puts `lscpu | grep "Model\ name"`.split(':').last.strip
end


v = nil
timing = []
10.times.each do |i|
 time = Benchmark.realtime do
  v = fib(N)
 end
 timing << time
end

puts "average time: #{timing.sum / timing.size} s"
puts "expression: fib(#{N}) = #{v}"

Digital ocean smallest droplet
ruby version: 2.5.1
Intel(R) Xeon(R) CPU E5-2650 v4 @ 2.20GHz
average time: 4.729319591900003 s
expression: fib(38) = 39088169