How to Find and Fix 7 Hidden Performance Bottlenecks in Your JavaScript Code

<p>I once audited a page where nearly 40% of the main thread blocking time came from a tag manager firing scripts that the engineering team didn't know were still active.

<p><em>A complete developer tutorial on measuring, diagnosing, and eliminating Cumulative Layout Shift in React applications using the open-source <code>@page-speed/hooks</code>

<p>Random 30–50ms freezes with no obvious long tasks in the Performance panel often have one root cause: the garbage collector. V8 pauses JavaScript execution to reclaim memory,

<p>JavaScript performance is rarely about one magical optimization. Real performance improvements usually come from reducing unnecessary work, choosing efficient data structures,

<p>Every performance article on Dev.to quotes the same two stats. You know them. Amazon. Walmart. The 100ms one. Everyone has seen them.</p> <p>Nobody measures what their own

<p>We shipped a feature on a Tuesday. By Thursday the API was timing out. The monitoring dashboard showed p99 latency climbing from 80ms to 14 seconds over 48 hours. Nothing had

<p>In <a href="https://amanksingh.com/blog/production-security-checklist" rel="noopener noreferrer">A Production Security Checklist</a>, I walked through what to lock down before

<h2> High-Performance WordPress Development: Architectural Lessons from the mike.co.ke Rebrand </h2> <p>WordPress has a performance problem, and we refused to be part of it.</p>