check-performance

Analyze a URL for Core Web Vitals issues by running a Bun-based TypeScript script that checks HTML patterns to detect render-blocking CSS and JS. The script identifies missing preloads, oversized inline resources, and absent image dimensions, then reports optimization opportunities.

Poor LCP and CLS scores often stem from render-blocking resources, missing preloads, and absent image dimensions. This Skill identifies these specific HTML pattern issues, providing actionable suggestions to defer non-critical scripts and optimize resources for speed improvement.

Yes, you can audit a collection of URLs for unoptimized resources. The script processes single pages or site-wide audits, applying render-blocking checks and identifying missing resource hints across multiple URLs to provide optimization opportunities.

Yes, you need Bun installed to run the check-performance script. The implementation uses a Bun-based TypeScript script executed via the command line, requiring no other dependencies to analyze HTML and report performance issues.

The best way to detect unoptimized HTML resources is using a script that analyzes HTML patterns for oversized inline resources and missing preloads. It checks for absent image dimensions and render-blocking CSS or JS to provide actionable page speed optimization suggestions.

Your web page may load slowly due to render-blocking CSS or JavaScript, missing resource preloads, or unoptimized inline resources. Analyzing the HTML patterns of your URL can identify these specific bottlenecks and provide suggestions to improve Core Web Vitals.