Unminified CSS contains whitespace, comments, and formatting that make files larger than they need to be. Minifying CSS strips out these extras and reduces file size, helping pages render faster, especially on slower connections. Minification should be an automatic step in your build process. Hits - 372 Synonyms - CSS Minification, Stylesheet Optimization |
Unminified JavaScript includes extra whitespace, comments, and formatting that increase file size without adding functionality. Serving minified JavaScript reduces download and processing time for visitors. Making minification an automatic part of your build pipeline keeps performance consistent. Hits - 350 Synonyms - JS Minification, Script Optimization |
Unsized Images are pictures placed on a page without declared width and height, causing the layout to jump around as they load. This contributes to layout shift and a poor visual experience. Always set image dimensions or use CSS aspect ratios to keep the page stable during loading. Hits - 333 Synonyms - Missing Dimensions, No Width/Height |
Unused CSS Rules are styles shipped to the browser that never actually apply to anything on the page. They add unnecessary weight, slow down rendering, and make stylesheets harder to maintain. Regularly cleaning out dead CSS keeps your stylesheets lean and your pages fast. Hits - 342 Synonyms - Dead CSS, Unused Styles |
Unused JavaScript is code sent to the browser that never runs during a normal visit. It wastes bandwidth, increases processing time, and slows the page down for no benefit. Auditing and removing unused code is one of the most effective ways to improve front-end performance. Hits - 351 Synonyms - Dead Code, Unused JS, Code Splitting |
URL Canonicalization is the practice of picking one preferred URL when the same content is accessible at multiple addresses. It tells search engines which version to index, preventing duplicate content confusion. Strong canonicalization keeps your ranking signals focused on the right pages. Hits - 368 Synonyms - Canonical URL, Preferred URL |
Using Landmarks means organizing your page into clear structural regions like header, navigation, main content, sidebar, and footer. Screen readers use these landmarks to let users jump directly to the section they need. Consistent landmark usage makes your site much easier to navigate. Hits - 338 Synonyms - ARIA Landmarks, Page Regions |
Preconnect is a hint you give the browser to start connecting to important external servers before they are actually needed. It reduces connection setup time and can speed up loading for critical resources. Use it sparingly though — too many preconnects can waste resources. Hits - 332 Synonyms - Preconnect, Early Connection, DNS Prefetch |
Rel=preload tells the browser to fetch important resources, like fonts or key scripts, as early as possible in the loading process. Used wisely, it speeds up first render and reduces delays for critical assets. Overusing it can backfire by competing with other important downloads. Hits - 344 Synonyms - Resource Preloading, Preload Hint |
Text compression means shrinking text-based files like HTML, CSS, JavaScript, and JSON before sending them to the browser. Gzip and Brotli are the most common methods, and they can dramatically reduce transfer sizes. Enabling compression is one of the easiest server-side performance wins. Hits - 348 Synonyms - Gzip, Brotli, File Compression |
User Timings are custom performance measurements you define to track moments that matter most to your specific product or workflow. They go beyond generic metrics to capture things like how long a checkout flow takes or when a key feature becomes usable. They make performance data more actionable. Hits - 335 Synonyms - Custom Metrics, Performance Marks |
Uses Long Cache TTL checks whether static assets (scripts, stylesheets, images, fonts) are served with a long browser cache lifetime. Short or missing cache headers force repeat visitors to re-download assets they already have, wasting bandwidth and slowing page loads. Hits - 154 Synonyms - Browser Caching, Cache TTL, Cache-Control Max-Age
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