I have two links for you, both of them make PHP much faster (and cheaper) on AWS.
https://pilsniak.com/aws-speedup-php – Did you know that Amazon/AWS contributes to PHP source code? Look this: “WordPress provides up to 34% better price/performance” – they do that.
https://pilsniak.com/async-aws – Async doesn’t stop your application during connection to AWS services. You can do much more operations in one sec!
If you have any questions or thoughts feel free to reach me anytime.