Some more PHP 7.0 vs PHP 7.1 benchmarks available here:
Conclusion: PHP 7.1 is doing even better than its predecessor branch 7.0 \o/
Interesting approach to improve security - Continuous Pwning of the Top 1000 WordPress Plugins:
I am not sure what happened to request a implementation that allows parameter type variance for PHP 7.1+. Method definitions are kind of contracts. You can not override a integer parameter in later method extensions as a string.
A logical step would be that arrays "implements" traversable or better strict_types=0 would cast arrays to a traversable implementing standard object and strict_types=1 would force arrays to... be array and traversable to be objects implementing traversable. The traversable standard object should be also implemented as a cast like: (traversable)
The RFC approach would brake the common OOP concept of PHP.
What do you think ?