At Twilio, we take blogging seriously and use a dashboard to analyze our blog content’s performance. Initially, we used SQLite as the database for this dashboard, but as our blog grew with more articles and users, we started experiencing slower query results. So, we decided to test PostgreSQL as an alternative to improve performance. Using SQLAlchemy, we were able to easily switch between the two databases. We designed a test script to measure the response times of different queries on both databases. Surprisingly, PostgreSQL performed better for shorter queries, while SQLite excelled in longer queries. Ultimately, we realized that performance depends on the specific use case and database configuration.
https://www.twilio.com/blog/sqlite-postgresql-complicated