There can be a number of reasons why your application performs poorly, but perhaps none are as challenging as issues stemming from your database. If your database's response times tend to be high, it can cause a strain on your network and your users’ patience. The usual culprit for a slow database is an inefficient query being executed somewhere in your application logic.
Source: Know Your Database Types, an article by Ben Fritsch.
I have noticed that there was a pattern of low-hanging fruits, where you could make 80% of the performance gains in 20% of the time.
Source: iOS Performance tips you probably didn't know (from an ex-Apple engineer), an article by Rony Fadel.
Scale your existing asyncio application to thousands of cores with 20 lines of code. Ray added two features to enable seamless integration with Python asyncio ecosystem. Both features help to scale your existing asyncio application to multi-core and multi-node.
Source: Scaling Python Asyncio with Ray, an article by Simon Mo.