OP was saying porting a project to Go sounds like premature optimization. The alternative is obviously to continue to use the original language.

The question to be answered is why are you porting it? Fun and giggles? Hoping to achieve better performance? Scale? Portability? Correctness? Simplicity? Support?

I'd say most of the time its for fun and giggles. Which I think is as fine a reason as all the others, but when its costing someone's elses money, maybe you should be more considerate.