Prisma makes it easy to write readable queries, but you can still create N+1 patterns by fetching parents and then fetching children in a loop. I prefer using include or select to get related data in one query when the cardinality is reasonable. I als

Criterion is the standard benchmarking library for Rust. It runs benchmarks multiple times, detects outliers, and reports statistical confidence intervals. The API is simple: wrap your code in a closure, and criterion measures execution time. It gener

Traits define shared behavior, and trait bounds let you write generic functions that work with any type implementing a trait. The syntax T: Display means "T must implement Display." This is similar to interfaces in other languages but more powerful: y

Sidekiq processes background jobs asynchronously using Redis and multi-threading. ActiveJob provides framework-agnostic interface—I use it for portability between job processors. Jobs handle emails, data processing, API calls, report generation. perfo

When a page has many small targets, wiring dozens of Turbo Stream operations can get noisy. Rails’ broadcasts_refreshes (Rails 7.1+) lets you take a pragmatic approach: broadcast a refresh, and Turbo morphs the page. It’s not always the right choice (

I use PageNumberPagination for simple, bookmark-friendly pagination and CursorPagination when data changes frequently (prevents duplicate/missing items between pages). Creating a custom pagination class lets me control page_size, page_size_query_param

When receiving webhooks from external services, signature verification ensures the payload comes from the claimed sender and hasn't been tampered with. Services like Stripe and GitHub include an HMAC signature in headers computed from the request body

For apps with replicas, route read-only code paths to reading role and enforce prevent_writes. This is a strong reliability move: accidental writes on replicas become exceptions instead of silent data loss.

Array methods enable functional programming patterns in JavaScript. The .map() method transforms each element and returns new array. I use .filter() to create arrays with elements meeting criteria. The .reduce() method accumulates values into single r

SQL joins combine data from multiple tables. INNER JOIN returns matching rows only. LEFT/RIGHT JOIN includes all rows from one table, nulls for non-matches. FULL OUTER JOIN combines both. I use CROSS JOIN for Cartesian products sparingly—performance k

Reqwest is the most popular async HTTP client for Rust. It's built on tokio and hyper, with a high-level API for making requests. Connection pooling, redirects, timeouts, and TLS are handled automatically. I use the builder pattern to configure client

Sessions store user state across requests. Django supports database, cache, file, and cookie-based sessions. I use cacheddb for read performance with database persistence. For APIs, I avoid sessions in favor of token auth. The request.session dict-lik