For hard realtime systems it actually doesn't matter anymore. These are mostly implemented with a "don't allocate at all" strategy, since every allocation is no

For hard realtime systems it actually doesn't matter anymore. These are mostly implemented with a "don't allocate at all" strategy, since every allocation is not determistic. Therefore things are mostly statically allocated and bounded. And maybe there are some objects pools are around. You can do this in Go in the same way as in C. The only question there is if the GC will still run in the respective languages if no allocations happen through the user (e.g. because the runtime could do allocations in the background for it's housekeeping).