PHP 7 is up to twice as fast as PHP 5.6. It’s a major performance improvement over all previous version of PHP, and also adds a some syntax goodies, bug fixes and small enhancements. We’re making PHP 7.0.0 available on demand to all Pressjitsu hosting customers.
WordPress 4.3 has been released and features menu management in the Customizer, favicons, formatting shortcuts, stronger passwords and a bunch of smaller fixes and enhancements.
WooCommerce is often a serious concern when it comes to speed, with many products and (hopefully) thousands of orders, the database becomes quite bulky. Yet, worse than a bulky database are underoptimized SQL queries that slow down the WordPress site to a standstill.
The WordPress Core Team has released version 4.2.4, which is a security and maintenance update. All WordPress users are encouraged to upgrade immediately.