> The C++ equivalent would be to allocate as much as possible on the stack, and then make sure to do a restart every night to eliminate any heap fragmentation that is left.

I think that's a very brute-force approach. You could instead use an actual allocator which behaves the way you want.

For example this is how arena can work without any restart/stack magic: https://github.com/cleeus/obstack/blob/master/arena_test.cpp...

Same happens in google's protobufs https://developers.google.com/protocol-buffers/docs/referenc...

There's no need (almost) for manually wiping heaps at system level if your language allows you to change the allocator at any point of the app.