About Our Report
The URLMetrix.net Report's scoring system is loosely based on the Google site performance scoring system, where A is the best score, and F is the worst. The URLmetrix overall report grade is a weighted grade derived from the Performance Insight, Implementation, and Web Vitals Grades.
Performance Insight Grade
The Performance Insight Grade evaluates how well your website performs under various conditions using our browser, hardware specifications, and specified analysis options (AdBlock, connection speeds, etc.) initiated from our extensive GEO locations across multiple devices and networks.
30%
Loading Performance
Initial Content Display, Content Load Speed and Main Content Load Time: Evaluate the time required to display various content elements.
15%
Interactivity
Total Blocking Time: Measures the total time the page is blocked from responding to user input.
15%
Visual Stability
Cumulative Layout Shift: This measure assesses the page's visual stability and unexpected layout shifts.
20%
Geographic Differences
Tests performance across various geo locations and regions to determine loading time, interactivity, accessibility, and stability.
10%
Network Differences
Evaluates performance through different network types, such as residential or mobile operators, to determine loading time, interactivity, accessibility, and stability.
10%
Device Differences
Tests performance across browsers, devices, and user agents to determine loading time, interactivity, accessibility, and stability.
Implementation Grade
The Implementation section evaluates how well your page is built for optimal performance. We’ve assigned point values to each audit based on factors like potential savings and importance, as determined by the URLMetrix.net team. This part of the report includes the following tests and audits:
Best Practices Audits
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Avoids using deprecated APIs : Checks if the page uses outdated APIs.
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Uses HTTP/2 Audit: Ensures the page uses HTTP/2 for all resources.
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Avoids enormous network payloads: Checks if the page has large network payloads.
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Reduces JavaScript execution time: Measures the time spent executing JavaScript.
Accessibility Audits
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Color contrast : Checks the contrast between foreground and background colors.
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Image alt attributes: Ensures images have meaningful alt attributes.
SEO Audits
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Meta descriptions: Checks if pages have meta descriptions.
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Descriptive link text: Ensures link text is descriptive and meaningful.
Progressive Web App (PWA) Audits
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Service Worker : Checks if the page uses a service worker.
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HTTPS Ensures the site is served over HTTPS.
Web Vitals Grade
Web Vitals' core metrics are essential for delivering a fast website experience. The Performance Grade encompasses these core Web Vitals: loading performance, interactivity, and visual stability, ensuring your website offers a high-quality user experience.
Web Vitals, introduced by Google, are a set of metrics designed to measure and ensure the quality of user experience on the web, focusing on various aspects of web performance and user interaction. They are crucial for understanding your website's performance regarding speed, responsiveness, and visual stability. In addition to the Core Web Vitals covered in the Performance section of the URLMetrix.net report, we also evaluate other important metrics in this part.
Time to First Byte (TTFB)
the duration from the moment a client makes an HTTP request to when it receives the first byte of the server's response, reflecting the server's responsiveness and efficiency.
First Contentful Paint
the time it takes for a browser to render the first visible content from a web page, indicating the start of the page's visual loading.
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Total Blocking Time
total time a page is blocked from responding to user input, measured from FCP to Time to Interactive (TTI).