Example of async open-uri with Ruby 3. See https://www.codeotaku.com/journal/2020-06/open-source-progress-report/index

async_fetch.rb

require 'async'
require 'async/barrier'
require 'open-uri'

def async_fetch(*urls)
  barrier = Async::Barrier.new

  Async do
    urls.map do |url|
      barrier.async { URI.open url, &:read }
    end.tap { barrier.wait }
  end.result.map(&:result)
end

url = 'https://api.kanye.rest?format=text'
puts async_fetch url, url, url