Asynchronous result blocks with wait about async-await

[LeandroRezendeCoutinho]

Thanks for the answer! Your are right... I see that CPU cost of example blocks the execution...
I tried another approach and it worked.
Thank you so much for spendind time with this.

[ioquatix]

The problem with your example is that you are not doing any non-blocking operations. Your fibonacci is a tight loop and never yields control.

require 'async/await'

class AsyncFibonnaci
  include Async::Await

  async def fibonacci(number)
    Async::Task.current.yield
    
    if number < 2
      return number
    else
      return fibonacci(number - 1).wait + fibonacci(number - 2).wait
    end
  end
end

class AsyncRunner
  include Async::Await

  async def run
    5.times do |i|
      puts "loop #{i}"
      fib
    end
  end

  async def fib
    instance = AsyncFibonnaci.new
    num = rand(30)
    puts "Number was #{num}"
    result = instance.fibonacci(num).wait
    puts "Fibonacci results #{result}"
  end
end

runner = AsyncRunner.new
runner.run

The above example has a yield statement which I think achieves what you want. However there will be a slightl performance cost.

[ioquatix]

You are most welcome!