How do you ensure that a website is optimized for performance and loading speed on different network types (e.g., 3G, 4G, Wi-Fi)?
- garrone
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Sample interview questions: How do you ensure that a website is optimized for performance and loading speed on different network types (e.g., 3G, 4G, Wi-Fi)?
Sample answer:
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Minimize HTTP Requests: Reduce the number of HTTP requests by combining multiple files into a single file (CSS, JavaScript) through tools like CSS minifiers and JavaScript bundlers. Implement CSS Sprites or web fonts to combine multiple images into a single file.
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Optimize Images: Compress images by reducing their file size without compromising their visual quality. This can be done using online tools or software like Photoshop. Choose appropriate image formats; JPG for photos, PNG for graphics, and SVG for icons and logos.
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Defer Loading of Non-Essential Resources: Prioritize loading of critical resources like HTML, CSS, and JavaScript files that are crucial for the initial page display. Defer the loading of non-essential resources, such as images and videos, using techniques like lazy loading or async loading.
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Implement Browser Caching: Enable browser caching to store static resources like images, CSS, and JavaScript files locally on the user’s computer. This speeds up subsequent page views by reducing the number of server requests. Use cache-control headers to specify the duration and conditions for caching.