Help to minimize JS and load time

Hello, I’m in need of help implementing simple API code to minimize my load time and JS code on my page. I have come across GZIP rendering and split coding, but all this sounds like a complete diff language. Hoping someone can guide me to the right steps to make this happen

anybody please

Maybe interesting for you.

Thanks, now if only i can do this for mobile platforms, that would be great. The low score is taking so much already :confused: very few solutions