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About Saurav TB Pandey

Welcome to my technical blog! I am Saurav TB Pandey, a full-stack software engineer and open-source enthusiast specializing in TypeScript, React, Node.js, and modern distributed systems.

This blog serves as a developer-first platform sharing practical guides, system architecture breakdowns, daily tech term deep dives, and performance engineering insights.

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Open Source Library: react-hook-lab (npm)

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The Silent Performance Killer in Your Code: The N+1 Database Query

What is the N+1 Query Problem? The N+1 query problem is a performance bottleneck that occurs when an application communicates with a database in an inefficient, repetitive sequence. Instead of retrieving all necessary records and their related data in a single, unified database query, the application executes one initial query to fetch a list of parent records, and then triggers an additional query for each individual record to fetch its child data. This repetitive back-and-forth communication drastically increases network overhead and degrades system performance. A Relatable Real-Life Analogy Imagine you are preparing a multi-layered fruit salad using five different types of fruit. Instead of writing a complete grocery list, driving to the store once, and buying all five fruits at the same time, you decide to buy them one by one. You drive to the store to see what fruits are available (this is the "1" initial query). You see apples, bananas, grapes, oranges, and strawber...

How to Track and Parse Browser URLs in React Without Router Locks

When building modular user interfaces in React, we often need components to behave dynamically based on the current URL. Perhaps your sidebar needs to highlight active parent routes, your document viewer needs to read a file extension from the path, or your analytics module needs to know where the user navigated from. Doing this usually locks you into a specific router package—until now. With the release of the new useURL hook in react-hook-lab , React developers now have access to a lightweight, zero-dependency, and deeply-parsed representation of the browser's address bar. It automatically reacts to standard back/forward navigation, hash modifications, and programmatic history state changes. The Architecture: Reactivity on Top of the History API Standard routing packages wrap your entire application in context providers to distribute routing states. While powerful, this structure restricts cross-compatibility. useURL overcomes this constraint by safely overriding window.hi...

Stop Guessing: Diagnosing React Re-Renders with the New useRenderReason Hook

Stop Guessing: Diagnosing React Re-Renders with the New useRenderReason Hook React developers have a love-hate relationship with re-renders. When a UI gets sluggish, tracking down exactly which prop, hook, or state change triggered a component to update can feel like looking for a needle in a haystack. Sure, you can write temporary useEffect blocks or pull up complex browser profilers. But what if your codebase could tell you exactly why a component re-rendered in plain English, directly in your console? To make performance optimization straightforward and stress-free, we are excited to introduce a powerful new debugging utility to the react-hook-lab family: useRenderReason ! What's Changed? We have added the useRenderReason hook, a development-time diagnostic tool that hooks into your React component's lifecycle. It tracks properties or state values you pass to it, classifies every single change, and logs clear, actionable feedback to the console. Unlike trad...

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