Yep, very much this. I code async CLI apps and I seriously don't care that the CLI args and the data structures they get transformed to are cloned 250 times at startup because after that 99% of the actual heavy-duty code is working with channels and references with nearly zero memory pressure. Memory usage gets bumped up by about 2% after the first 1-2 minutes of operation and it stays constant for next 11 hours during which I've monitored it.

I don't even need to benchmark anything. The apps are working ultra fast on a Celeron J450 CPU at ~20MB RAM usage and barely hit 10% CPU (since they're mostly network-bound).

No need for premature optimization. I haven't dived in the lifetime hell of Rust yet but I'm already quite productive and I will only be using zero-allocation techniques if my current code proves inadequate the the ever-increasing demand that these apps will soon face.