performance-optimization

Fix N+1 queries in Rails by configuring Bullet to detect lazy loading and applying ActiveRecord eager loading patterns like includes, preload, or eager_load to batch associated records and reduce query counts.

Optimize slow SQL queries by analyzing EXPLAIN plans, adding targeted database indexes like composite or covering indexes, and refactoring ActiveRecord patterns to use select, pluck, or exists? for faster data retrieval.

Rack-mini-profiler helps with Rails performance by measuring request-level execution times and database query costs, allowing you to pinpoint slow endpoints and identify which ActiveRecord calls require optimization.

Prevent Rails performance regressions by adding test-time query counting assertions and Bullet configuration to your test suite, ensuring that N+1 queries or unexpected database calls fail the build before deployment.

Reduce memory bloat when processing large ActiveRecord datasets by replacing load-all queries with batching methods like find_each or in_batches, and using pluck or enumerators to stream records without instantiating full objects.

Bullet works with Rails test environments for N+1 detection by raising warnings or errors when associations are lazily loaded or eagerly loaded unnecessarily, validating eager loading strategies during automated test runs.