You can use caching and web server to speed up the performance of Drupal 7 website as well.
I have hosted my website with Cloudways (https://www.cloudways.com/en/drupal-cloud-hosting.php ) and they use Apache, Nginx, Memcached and Varnish stack on their platform. Apart from that, I also use Cloudflare CDN and PHP 7. When all of this is combined, it becomes a powerhouse for high speed Drupal website.
You can use caching and web server to speed up the performance of Drupal 7 website as well.
I have hosted my website with Cloudways (https://www.cloudways.com/en/drupal-cloud-hosting.php ) and they use Apache, Nginx, Memcached and Varnish stack on their platform. Apart from that, I also use Cloudflare CDN and PHP 7. When all of this is combined, it becomes a powerhouse for high speed Drupal website.