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SQLite serves 4 million queries per second
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Thought some of you would be interested in this:

Scaling SQLite to 4M QPS on a Single Server

<https://blog.expensify.com/2018/01/08/scaling-sqlite-to-4m-qps-on-a-single-server/>

tl;dr: This is not an unmodified use of the SQLite API.  You have to make changes in the underlying infrastructure.