Doing it currently, Python to Go. Early indications are a 50-98% increase in speed (e.g. one testcase went from 26hrs to 30mins) for network/CPU heavy workload. Conversion via Qwem, lots of testing needed but compute savings will be worth it.

Did you mean “50-98% decrease in running time”? Just calculating from your 26hrs to 30 mins seems to imply so. In terms of speed that translates to 100% to 5100% increase in speed.

Why not go with something like graalpy first? That's much less risk in terms of "we end up slightly changing behavior"