So up until now, HHVM was far and away faster than PHP, like twice as fast. They potentially save millions of dollars on costs if they can run their business with fewer servers. Someone like Facebook obviously has a big interest in having their code execute as quickly as possible.
It processes and optimizes PHP code differently than the typical PHP Zend engine. If you aren't familiar with HipHop, it's a PHP virtual machine with just-in-time compilation that was developed by Facebook. And it compares nicely with the HipHop Virtual Machine or HHVM. So it depends on exactly what you're doing, but in general, PHP 7 is twice as fast as PHP 5.6. And we see something similar with the Zend Framework. For the Laravel Framework, 256 requests versus 485. PHP 7 can handle 374 of the same kinds of requests per second. So for example, with WordPress, PHP 5.6 could serve 191 requests per second. For PHP 5.6 versus PHP 7.0, we're comparing the number of requests per second that each one can do with popular applications and frameworks. You can go to their website if you want to see the full list of benchmarks. So I'm going to give you a summary of some of those here. To get an idea of how much faster the two are side-by-side, Zend put together some benchmarks. That's significant, and it has an impact in terms of real-world dollars. And that means that data centers could need half as many servers in order to serve the same number of customers at the same speed as they did before. That means that not only can you return pages to your users twice as fast, but it also means that a single server can handle twice as many requests because it can finish with one request and it's ready to receive a request from someone else.
This is not just a 10% increase like we've seen on some previous versions of PHP. How much faster? It's roughly twice as fast. It moves things around in memory a lot less, and that makes it faster. And it uses a lot less memory in that process. PHP 7 has a number of optimizations in the way that it processes the PHP code and turns it into assembly language or machine language that your computer can understand. In my opinion, this is by far and away the primary reason that you should consider upgrading to PHP 7, no matter what your circumstances, because it's much faster. It's the fact that PHP 7 has significantly better performance than previous versions of PHP.
The biggest feature of PHP 7 isn't actually a feature at all.
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