As per the Zend team, following illustrations show the performance comparison of PHP 7 vs PHP 5.6 and HHVM 3.7 on popular PHP based applications.
Magento 1.9
PHP 7 proves itself more than twice as faster, as compared to PHP 5.6 while executing Magento transactions.
Drupal 7
PHP 7 proves itself more than twice as faster, as compared to PHP 5.6 while executing Drupal transactions.
Wordpress 3.6
PHP 7 proves itself more than twice as faster as compared to PHP 5.6 while executing Wordpress transactions.
Comparison of Dynamic Languages
