These sorts of comments are (no offense) worse than useless. Benchmarking is one of the most difficult things to do in software, and anecdotes like this just make things confusing for new engineers and feed the perpetual hype train around newer languages.
Please refrain from making statements like this unless you have a reproducible quantifiable analysis.
If you really wanted to demonstrate the effect you describe you'd need to have the same team rewrite the application twice, once Java->Java, once Java->go, making sure to align the program structure as much as possible (making exceptions to take advantage of lang specific features of course).
If you were to do that, then that would be interesting! No one does that of course because it's expensive and wasteful from a business perspective, but it's the only way to determine anything useful.
Please refrain from making statements like this unless you have a reproducible quantifiable analysis.
If you really wanted to demonstrate the effect you describe you'd need to have the same team rewrite the application twice, once Java->Java, once Java->go, making sure to align the program structure as much as possible (making exceptions to take advantage of lang specific features of course).
If you were to do that, then that would be interesting! No one does that of course because it's expensive and wasteful from a business perspective, but it's the only way to determine anything useful.