How to Improve ActiveRecord Performance with Subquery Caching
06-Aug-2020 1369
Slow database queries are a common performance bottleneck for Ruby on Rails apps. Simplifying a complex query is often not possible due to the underlying business logic. Instead, you can extract parts of a query, cache and reuse them to improve performance. In this tutorial, I’ll describe a range of techniques on how to do it.We will cover more advanced ActiveRecord and PostgreSQL topics like EXPLAIN ANALYZE, and query plan visualizer tool.Let’s get started!.
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