Hello, PHP community.
As you already know, PHP 7 offers a huge performance boost, whether it is the memory usage, or the requests per second (which is almost doubled).
Now, we know this is due to the new Zend Engine 3. Let me quote from the Rogue Wave (Zend) website :
"Thanks to the new Zend Engine 3.0, your apps see up to 2x faster performance and 50% better memory consumption than PHP 5.6, allowing you to serve more concurrent users without adding any hardware."
Can you guys explain to me, or at least find me references/articles/docs, what are the reasons that PHP 7 is that much better performing than PHP 5.6? What are those changes in Zend Engine 3 that make all the difference?
I'd appreciate both your explanations or any articles you can find for me to read.