Yes, this is exactly what I’m taking about. You don’t need to share objects. Have explicitly shared buffers instead. Python is a dynamic language so you can ea

Yes, this is exactly what I’m taking about. You don’t need to share objects. Have explicitly shared buffers instead. Python is a dynamic language so you can easily build proxy objects that are views into a shared buffer, and this allows you to keep all your single threaded performance because no objects are shared. For example: buf = sharedbytes.alloc(1 * GiB) with buf.lock(lockid): buf[10:20] = 42 message_other_process(buf.id) # other process def recv_buffer(bufid): buf = sharedbytes.get(bufid) with buf.lock(lockid): print(buf[10:20]) Most people don’t even need that and would be satisfied with just virtual processes and copying message passing between them.