如何支持高并发部署

从 flask 本身来讲

多线程方式
- app.run(threaded=True)
- param threaded: should the process handle each request in a separate thread?
多进程方式
- app.run(processes=True)
- param processes: if greater than 1 then handle each request in a new process up to this maximum number of concurrent processes.

从部署，gunicorn + gevent 方式

reference: https://blog.igevin.info/posts/how-to-deploy-flask-apps/
gunicorn -c gunicorn.py backend.wsgi:app

从代码，gevent 方式

python main.py pro
python main.py dev