FWIW, I used to write some high-performance JavaScript. One of the tricks of the trade was to allocate early and make sure you avoid allocating once the loading

FWIW, I used to write some high-performance JavaScript. One of the tricks of the trade was to allocate early and make sure you avoid allocating once the loading phase has started, hence avoiding triggering the garbage-collector (in most runtimes/languages, gc phases are typically triggered by the allocator). This involved writing very non-idiomatic code, to a large extent reimplementing a form of high-level custom allocator on top of the existing allocator/gc, but it worked. I'd be very surprised if the same wasn't possible in Java. I don't know if this is how gRPC is written but it could explain an apparent contradiction.