Install and configure Vercel Speed Insights#1
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# Vercel Speed Insights Implementation Report ## Summary Successfully implemented Vercel Speed Insights for this FastAPI project using the vanilla JavaScript approach. ## What Was Done ### 1. Documentation Research - Fetched the latest official Vercel Speed Insights documentation from https://vercel.com/docs/speed-insights/quickstart - Determined that since this is a Python/FastAPI backend project (not a JavaScript framework), the vanilla JavaScript script injection method is the appropriate implementation approach - No npm package installation required for this Python-based project ### 2. Implementation Details **Modified Files:** - `main.py` - Added Speed Insights tracking scripts to the HTML response **Changes Made:** - Injected the Speed Insights initialization script into the `<head>` section of the HTML response - Added the deferred Speed Insights tracking script that loads from `/_vercel/speed-insights/script.js` **Code Added:** ```html <script> window.si = window.si || function () { (window.siq = window.siq || []).push(arguments); }; </script> <script defer src="/_vercel/speed-insights/script.js"></script> ``` ### 3. Technical Approach Since this is a FastAPI application that serves HTML directly from Python code (not a Node.js/JavaScript framework), the implementation follows Vercel's vanilla JavaScript approach: 1. **No Package Installation**: Unlike React, Next.js, or other JS frameworks, this project doesn't require installing the `@vercel/speed-insights` npm package 2. **Script Injection**: The Speed Insights tracking is enabled by injecting JavaScript directly into the HTML `<head>` section 3. **Automatic Detection**: When deployed on Vercel, the platform automatically serves the Speed Insights script from `/_vercel/speed-insights/script.js` ### 4. How It Works 1. The `window.si` function initializes a queue for Speed Insights events 2. The deferred script loads asynchronously without blocking page rendering 3. Once deployed to Vercel, the platform will: - Enable the Speed Insights script endpoint automatically - Start collecting Web Vitals and performance metrics - Display the data in the Vercel dashboard under Speed Insights ### 5. Testing - Verified Python syntax is valid (no compilation errors) - Confirmed the script injection is properly placed in the HTML head section - The implementation follows Vercel's official documentation for vanilla JavaScript projects ## Next Steps To complete the Speed Insights setup: 1. **Deploy to Vercel**: Push these changes and deploy to Vercel 2. **Enable in Dashboard**: Navigate to your project in the Vercel dashboard and enable Speed Insights if not already enabled 3. **Verify**: After deployment, check the page source to confirm the Speed Insights script is loading 4. **Monitor**: View performance metrics in the Vercel dashboard under the Speed Insights section ## Notes - The Speed Insights script loads asynchronously with the `defer` attribute to avoid blocking page load - The script will only track metrics in production deployments on Vercel - No additional configuration is needed for basic functionality - The implementation preserves all existing HTML structure and styling Co-authored-by: Vercel <vercel[bot]@users.noreply.github.com>
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Vercel Speed Insights Implementation Report
Summary
Successfully implemented Vercel Speed Insights for this FastAPI project using the vanilla JavaScript approach.
What Was Done
1. Documentation Research
2. Implementation Details
Modified Files:
main.py- Added Speed Insights tracking scripts to the HTML responseChanges Made:
<head>section of the HTML response/_vercel/speed-insights/script.jsCode Added:
3. Technical Approach
Since this is a FastAPI application that serves HTML directly from Python code (not a Node.js/JavaScript framework), the implementation follows Vercel's vanilla JavaScript approach:
@vercel/speed-insightsnpm package<head>section/_vercel/speed-insights/script.js4. How It Works
window.sifunction initializes a queue for Speed Insights events5. Testing
Next Steps
To complete the Speed Insights setup:
Notes
deferattribute to avoid blocking page loadView Project · Speed Insights
Created by madib036 with Vercel Agent