Guards
Guards are configurable "finish line markers" that Speed Kit uses for pages that rely on Client-Side Rendering (CSR). On these pages, it can be difficult to determine when the main content has actually finished loading and is visible to the user. Guards are specific page elements that you define (e.g., the main product image or a specific container ). Speed Kit monitors the page and considers it "loaded" only when these guard elements have appeared, which allows for an accurate LCP measurement.
Related web performance terms
- Google Search Console
Google Search Console is a free service provided by Google that helps you monitor, maintain, and troubleshoot your website's presence in Google Search results.
- Googlebot
Googlebot is the official name for the web crawling bot that Google uses to discover, render, and index pages for its search engine. Speed Kit is designed to be fully compatible with Googlebot.
- gzip
gzip is a widely supported and common compression algorithm used by web servers to reduce the file size of text-based assets like HTML, CSS, and JavaScript.
- A/B Testing
A/B testing is a method of comparing two versions of a webpage to see which one performs better. For example, an e-commerce store might show 50% of its visitors a green "Buy Now" button (Version A)…