Well I almost have the same story, my agent harness is a 5mb rust binary that runs as systemd service and occupy 10mb of memory after days. This handles all communciations between 100+ agents.

Now I think go will come close to this number, so in reality, there might not be a real difference. But a leak somewhere is far more likely especially as these are mostly vibe coded (my binary has multiple functionality).

The biggest advantage that go have over rust is the stdlib and ecosystem that doesn't depend on 100 packages. And maybe that will be the deciding factor in the future or someone (I'm getting increasingly itchy for it) will need to reinvent the ecosystem to be less like npm.