This question explores Performance and addresses practical considerations related to: How can I reduce my website's First Input Delay (FID) score?

How can I reduce my website's First Input Delay (FID) score?

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How can I reduce my website's First Input Delay (FID) score?

Asked on Nov 10, 2025

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To reduce your website's First Input Delay (FID) score, focus on optimizing the main thread work and minimizing JavaScript execution time. FID measures the time from when a user first interacts with your site to the time when the browser can respond to that interaction.

Example Concept: FID is improved by breaking up long JavaScript tasks, deferring non-essential scripts, and using web workers to offload heavy computations. This ensures the main thread is available to handle user interactions promptly.

Additional Comment:

Use code-splitting to load only necessary JavaScript for the initial page load.
Implement lazy loading for non-critical resources to reduce initial load time.
Consider using the "async" or "defer" attributes for script tags to prevent blocking the main thread.
Analyze and optimize third-party scripts that may contribute to FID delays.
Regularly test your site with tools like Lighthouse to identify and address FID issues.

✅ Answered with Core Web Vitals best practices.

Ask any question about Performance here... and get an instant response.

How can I reduce my website's First Input Delay (FID) score?

Asked on Nov 10, 2025

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