I've been assigned to a new project at my company and they told me I have 100% freedom on the tech I can use to create a new SSO (Single Sign-On) solution for many websites that we manage. It's kind of a baby step towards building a pseudo social network with our websites.
My rationale here is that while I'm pretty familiarised with PHP and its whole stack (nginx, MariaDB, etc), I'm curious about the performance "risks" it has.
I'm currently looking for comparisons between NodeJS and PHP, specifically concurrency benchmarks, because we're expecting to have lots of traffic. I know some ways to handle this in PHP, but I'm not a NodeJS developer, this would be my first project.
I'm also aware that other languages such as Go can handle high amounts of concurrency easily, but I'm new on that front as well.
So what would you do? Code in the language you're familiar with, or take the high road and learn another one for the sake of the project's longevity and better performance?