If you’re configuring a Spring Boot application, you’ve likely used the @Value annotation to inject configuration values from application.properties or application.yml. It seems straightforward—but there are important subtleties to be aware of. In this post, I’ll break down the key…
In modern backend and infrastructure setups, managing storage performance and data reliability is critical. Whether you’re configuring local servers or working with cloud-hosted volumes, understanding RAID (Redundant Array of Independent Disks) is essential. In this post, we’ll break down RAID…
If you’re using TanStack Query (formerly known as React Query) to manage server state in your frontend application, you’ve probably come across two important settings: staleTime and gcTime. At first glance, both deal with caching and data retention — but…
If you’ve ever dealt with lazy loading issues, N+1 query nightmares, or mysteriously open database connections in your Spring Boot application, you’ve likely encountered the notorious Open Session in View (OSIV) setting. It’s a seemingly harmless configuration, but it hides…
JavaScript is a single-threaded language—meaning it processes one operation at a time. But then how does it handle asynchronous behavior like user events, timers, and network requests so efficiently? The answer lies in the Event Loop, a foundational mechanism that…
Java’s exception handling model is built around one crucial question: Who’s responsible for handling what? This philosophy emerges clearly in Java’s two main exception categories — Checked and Unchecked. Understanding the difference can guide cleaner, more maintainable code. Let’s dive…
If you’ve ever run a seemingly simple JPA query only to discover dozens of unexpected SQL statements firing off, you might’ve just encountered the infamous N + 1 problem. It’s a performance issue that creeps into your app subtly—but once…
Ever wondered how JavaScript knows where to store variables, which this refers to, or which scope to look into? Welcome to the Execution Context—the hidden environment that makes your code run just as you expect. Let’s unpack what it is,…
As front-end developers, understanding how browsers render pages can significantly improve your app’s performance. Two key processes in the rendering pipeline are reflow and repaint. Let’s break down what each does, why they matter, and how you can optimize them.…
When you’re working with JPA and Hibernate, the EntityManager is your primary interface for interacting with entities and the database. But to really grasp what’s going on, you need to understand the backbone: the Persistence Context. 🧠 What Is the…