Sharing Memory in Gunicorn?
It looks like the easiest way to do this is to tell gunicorn to preload your application using the preload_app option. This assumes that you can load the data structure as a module-level variable:
from flask import Flaskfrom your.application import CustomDataStructureCUSTOM_DATA_STRUCTURE = CustomDataStructure('/data/lives/here')# @app.routes, etc.Alternatively, you could use a memory-mapped file (if you can wrap the shared memory with your custom data structure), gevent with gunicorn to ensure that you're only using one process, or the multi-processing module to spin up your own data-structure server which you connect to using IPC.