Benchmark String Concatenation

[switchupcb]

Go performance benchmarks surrounding string concatenation indicate that performance gains can be made when string concatenation involving variable strings (e.g., function parameters) are used with the plus (+) operator.

• https://gist.github.com/dtjm/c6ebc86abe7515c988ec
• https://dev.to/jonathanlawhh/golang-string-concatenation-what-how-why-3fcd

disgo performs string allocation heavily in endpoints.go.

It would be awesome if someone benchmarked various string concatenation methods to determine the most performant implementation of string concatenation for endpoints.go functions. This implementation will be used to generate endpoints.go functions.