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My Flask applications has to do quite a large calculation to fetch a certain page. While Flask is doing that function, another user cannot access the website, because Flask is busy with the large calculation.
Is there any way that I can make my Flask application accept requests from multiple users?
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The server component that comes with Flask is really only meant for when you are developing your application; even though it can be configured to handle concurrent requests with app. run(threaded=True) (as of Flask 1.0 this is the default).
Flask will process one request per thread at the same time. If you have 2 processes with 4 threads each, that's 8 concurrent requests.
Any flask application, while handling a request, creates a Request object. This object created is dependent on the environment as received by the WSGI server. A worker is able to handle only one request at a time. As the request is made, the flask application automatically pushes a request context during the course.
As of Flask 1.0, flask server is multi-threaded by default. Each new request is handled in a new thread. This is a simple Flask application using default settings.
Yes, deploy your application on a different WSGI server, see the Flask deployment options documentation.
The server component that comes with Flask is really only meant for when you are developing your application; even though it can be configured to handle concurrent requests with app.run(threaded=True) (as of Flask 1.0 this is the default). The above document lists several options for servers that can handle concurrent requests and are far more robust and tuneable.
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