How can I resolve various performance issues, such as eliminating render-blocking resources, deferring unused CSS, ensuring text remains visible during webfont load, minimizing main-thread work, serving static assets with an efficient cache policy, reducing JavaScript execution time, avoiding an excessive DOM size, and minimizing Critical Requests Depth in my Webflow site?

To resolve Webflow site performance issues, you need to optimize render-blocking resources, CSS, fonts, JavaScript, asset caching, DOM structure, and critical requests.

1. Eliminate Render-Blocking Resources

• Minimize use of large third-party scripts (e.g., custom embeds, ad scripts).
• Enable Webflow’s built-in JS/CSS minification: Go to Project Settings > Hosting, then enable Minify HTML, CSS, and JS.
• Defer non-critical scripts: Move custom scripts to the Before tag section in Settings > Custom Code.

2. Defer Unused CSS

• Reduce unnecessary classes and simplify styles in the Webflow Designer.
• Avoid unused components or templates that introduce extra styles.
• Consider exporting your code and using a tool like PurgeCSS externally if you need more aggressive CSS pruning.

3. Ensure Text Remains Visible During Webfont Load

• Use font-display: swap by:
• Hosting fonts externally (e.g., via Google Fonts),
• Adding custom font CSS using font-display: swap in Project Settings > Custom Code > Head section.

4. Minimize Main-Thread Work

• Reduce complex animations, interactions, and auto-playing media.
• Use simple DOM structures and avoid deeply nested elements.
• Limit use of Lottie animations and large background videos.

5. Serve Static Assets With an Efficient Cache Policy

• Webflow already serves hosted assets with strong cache headers.
• For externally hosted images or scripts:
• Ensure your CDN applies long TTL cache headers.
• Self-host repeated assets in Webflow’s Asset Manager if needed.

6. Reduce JavaScript Execution Time

• Avoid unnecessary interactions in Webflow’s Interactions panel.
• Delete unused components like forms, sliders, or tabs if you're not using them.
• Limit use of custom JavaScript and avoid loading large libraries (e.g., jQuery plugins you don’t use).

7. Avoid an Excessive DOM Size

• Avoid deeply nested layout structures.
• Flatten your structure by using grid or flex layouts instead of multiple div wrappers.
• Remove hidden or duplicated elements across pages or breakpoints.

8. Minimize Critical Request Depth

• Webflow automatically defers some non-critical resources.
• Reduce the number of required fonts and heavy assets above the fold.
• Load images lazily using Webflow’s native lazy-loading option (set images to lazy in the Element Settings Panel).

Summary

To improve performance in your Webflow site: enable asset minification, minimize unused styles and scripts, optimize fonts with font-display: swap, serve assets efficiently, limit complex animations, streamline your DOM, and lazy-load images. Together, these actions target common performance metrics and improve load speed.