https://speakerdeck.com/dianaarnos/php-alem-do-sincrono
https://github.com/dianaarnos/php-alem-do-sincrono
curl_multi speed for PHP - https://gist.github.com/bmatheny/991247
Guzzle e o uso de curl_multi - https://github.com/guzzle/guzzle/blob/a3a20779541ca1ae73d0d3766a83c33d14468f9e/src/Handler/CurlMultiHandler.php
Coroutines - O que são corrotinas? | Dias de Dev - https://www.youtube.com/watch?v=Nbt0eQHChoI