retryable.rb

def inject_strategy(max_retries)
  (1..max_retries).inject(nil) do |result, attempt_number|
    begin
      return yield if block_given?
    rescue => e
      # intentionally blank
    end
  end
end

def retry_strategy(max_retries)
  tries ||= 0

  begin
    yield if block_given?
  rescue  => e
    return if tries >= max_retries

    tries += 1

    retry
  end
end

def times_strategy(max_retries)
  max_retries.times do |index|
    begin
      return yield if block_given?
    rescue  => e
      # intentionally blank
    end
  end
end

require 'benchmark/ips'

Benchmark.ips do |x|
  x.report('with retries') do
    retry_strategy(5) do
      raise "some error to allow the benchmark"
    end
  end

  x.report('with inject') do
    inject_strategy(5) do
      raise "some error to allow the benchmark"
    end
  end

  x.report('with times') do
    times_strategy(5) do
      raise "some error to allow the benchmark"
    end
  end

  x.compare!
end