https://www.google.com/amp/s/onilab.com/blog/php-7-vs-php-8/amp/ https://www.google.com/amp/s/onilab.com/blog/php-7-vs-php-8/... From the page above The bottom

https://www.google.com/amp/s/onilab.com/blog/php-7-vs-php-8/amp/ https://www.google.com/amp/s/onilab.com/blog/php-7-vs-php-8/... From the page above The bottomline: PHP 8 is still slower than PHP 7. This is a realistic comparison of running Magento on php7 vs php8.