Benchmarks don't matter. It's 2020. We use Stock Price Driven Development now.
The main reason to use Swift is Apple created it.
The main reason to use Go is it's the first two letters of Google.
The main reason to use Python is Google hired GvR in the 2000s and created momentum.
The main reason to use Kotlin is Google announced at I/O 2017 its support in Android Studio.
Get with the times gramps.