Florent Beaurain: Optimizing Rails Tests at Doctolib Scale
From On Rails by Rails Foundation, Robby Russell
October 7, 2025 · 1h 18m · Season 1 · Episode 6
About this episode
Florent Beaurain discusses optimizing Rails tests at Doctolib, focusing on performance improvements and managing a large test suite.
In this episode of On Rails, Robby is joined by Florent Beaurain, a longtime Rails engineer at Doctolib, home to one of the largest Rails monoliths in Europe with over 3 million lines of code and 400+ engineers. They explore how Doctolib’s team tackled massive test suite performance issues, including cutting one engine’s test time from seven minutes to under one minute. Florent shares insights from managing 84,000 tests, scaling across 10 PostgreSQL databases, and maintaining Rails upgrades a...
People in this episode
Host: Robby Russell
Guest: Florent Beaurain
Topics covered
- Rails optimization
- Test suite performance
- Software engineering
- PostgreSQL databases
- Rails upgrades
Keywords
- Rails
- testing
- performance
- Doctolib
- PostgreSQL
- software engineering
- test suite
Mentioned in this episode
Organizations: Doctolib
Places: Europe
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