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  Monitor admin performance issues by region with Web Vitals API - Shopify
  developer changelog
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  Shopify’s developer changelog documents all changes to Shopify’s platform.
  Find the latest news and learn about new platform opportunities.
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December 10, 2025

# Monitor admin performance issues by region with Web Vitals API

DateDecember 10, 2025

FlagsUpdate

SurfacesAPI

Enhance your app's global admin performance with regional data from the Web Vitals API. Each Web Vitals event now includes a country field with a two-letter ISO country code, allowing you to pinpoint where users encounter performance issues with your app.

This update enables you to understand regional performance patterns and optimize your app for users worldwide. You can segment admin performance data by geography to identify slow-loading regions, troubleshoot location-specific issues, and ensure consistent user experiences across various markets.

No additional setup is required; existing onReport callbacks automatically receive the new country field. Use this data to create more targeted performance optimizations and deliver faster admin experiences for merchants globally.

For more information about the Web Vitals API, visit the [developer documentation](https://shopify.dev/docs/apps/build/performance/admin-installation-oauth?utm_source=w26-editions-website\&utm_medium=product-cta\&utm_campaign=winter26edition#measure-your-apps-loading-performance).