ractors.rb

require 'benchmark'

ACTORS_COUNT = 8
THREADS_COUNT = 8

def iterative_fib(num)
  a = 0
  b = 1
  num.times do
    temp = a
    a = b
    b = temp + b
  end
  return a
end

def smth_heavy
  iterative_fib(1000000)
end

def paralelly
  actors = Array.new ACTORS_COUNT do
    Ractor.new { smth_heavy }
  end

  actors.map &:take
end

def sequentally
  threads = Array.new THREADS_COUNT do
    Thread.new { smth_heavy }
  end

  threads.map &:join
end

Benchmark.bm do |x|
  x.report { paralelly }
  x.report { sequentally }
end