They have details here: https://nickcraver.com/blog/2016/02/17/stack-overflow-the-ar...
Lots of caching, lots of RAM, SSD storage, and a low-level ORM for SQL.
Lots of caching, lots of RAM, SSD storage, and a low-level ORM for SQL.
but consider their stack there are better "starting" alternatives (they also used them before dapper), like Linq2Sql, EF Core, etc...
Also compared to other languages Linq and EF Core are way better than most alternatives (besides that some things are just not working, like lateral joins)