Glossary

Definition Performance monitoring refers to the process of measuring and analyzing the performance of a website or web application to ensure it operates efficiently. This involves tracking various metrics such as load times, uptime, resource usage, and response times....

Definition Gzip compression is a widely-used method for reducing the size of files sent from a web server to a browser. It uses the Gzip algorithm to compress HTTP responses, such as HTML, CSS, JavaScript, and other text-based resources, before sending them over the...

Definition Render-blocking resources are files (usually JavaScript, CSS, or web fonts) that prevent a webpage from being fully rendered or displayed until they are fully loaded. These resources can significantly delay the initial page load time, leading to poor user...

Definition Core Web Vitals are a set of specific website performance metrics defined by Google that measure real-world user experience. These vitals focus on three key aspects: loading performance, interactivity, and visual stability. Specifically, they consist of...

Definition Code optimization is the process of improving the efficiency, speed, and performance of your code without altering its functionality. It involves refining the structure, reducing redundancy, minimizing resource usage, and ensuring that the code runs faster...

Definition A caching mechanism is a process that stores copies of files or data in a temporary storage location, known as a cache, so future requests for that data can be served faster. Instead of fetching information from the original source every time—which can take...

Definition Image compression is the process of reducing the file size of an image without significantly sacrificing its visual quality. This makes the image faster to load while still appearing clear and detailed to viewers. Compression works by removing unnecessary...

Definition Minification is the process of removing all unnecessary characters from code (like spaces, line breaks, and comments) without changing how the code works. It’s most commonly applied to HTML, CSS, and JavaScript files to make them smaller and faster for...

Definition Lazy Loading is a web development technique where certain website elements—especially images and videos—are only loaded when they are about to appear in the user's viewport (visible part of the screen). Instead of loading all resources at once when a page...

Definition Page Load Time is the total amount of time it takes for a web page to fully display its content in a user’s browser after they click a link or type in a URL. It measures how quickly all elements—including text, images, stylesheets, and scripts—are loaded...