There were a lot of performance optimizations made with the update. Like reducing db queries (up to 40%), javascript optimization, code tuning for better performance in core and native plugins. It's all about to run Oxwall faster with the default shared hosting accounts.
According to the site performance optimizations, there are a lot of server's and software's options to run a site faster depending on traffic amount and budget possibilities. But, having software optimized for high load performance is the first deal before implementing any server's optimization effectively.
+1 having software optimized for high load performance is the first deal before implementing any server's optimization effectively