About CrUX Data
The Chrome User Experience Report (CrUX) collects anonymized, real-world performance data from Chrome users visiting your website. This provides valuable insights into actual user experiences rather than simulated tests.CrUX data is updated monthly and requires sufficient traffic to your site to generate meaningful metrics. New or low-traffic sites may initially show “Insufficient data” for some metrics.
Key Metrics
CrUX Metrics Dashboard
HTTP/S Performance
HTTP/S Performance Metrics
TTFB (Time to First Byte)
TTFB measures how long it takes for a user’s browser to receive the first byte of response from your server after making a request.- Excellent: Under 200ms
- Good: 200-500ms
- Fair: 500-1000ms
- Poor: Over 1000ms
To improve TTFB, focus on server optimization, implement caching strategies, optimize database queries, or consider upgrading your hosting resources.
FCP (First Contentful Paint)
FCP measures the time from when the page starts loading to when any part of the page’s content is rendered on the screen.- Good: Under 1.8 seconds
- Needs Improvement: 1.8-3.0 seconds
- Poor: Over 3.0 seconds
Web Performance
Web Performance Metrics
LCP (Largest Contentful Paint)
LCP measures the time it takes for the largest content element visible in the viewport to be rendered.- Good: Under 2.5 seconds
- Needs Improvement: 2.5-4.0 seconds
- Poor: Over 4.0 seconds
CLS (Cumulative Layout Shift)
CLS measures the sum of all unexpected layout shifts that occur during the entire lifespan of the page.- Good: Under 0.1
- Needs Improvement: 0.1-0.25
- Poor: Over 0.25
INP (Interaction to Next Paint)
INP measures the responsiveness of a page by observing the latency of all interactions a user makes with it.- Good: Under 200ms
- Needs Improvement: 200-500ms
- Poor: Over 500ms
Tracking Changes Over Time
LoadForge stores and tracks CrUX results monthly, allowing you to:- Monitor performance trends over time
- Identify seasonal patterns that affect user experience
- Measure the impact of optimization efforts
- Detect regressions after site updates
CrUX Metrics Trend Analysis
Sub-Page Analysis
LoadForge not only tracks your main domain but also analyzes performance for key sub-pages, helping you:- Identify specific pages with performance issues
- Prioritize optimization efforts based on page importance
- Compare performance across different sections of your site
Why Core Web Vitals Matter
Core Web Vitals are critical for both user experience and SEO:- Google Search Ranking: Core Web Vitals are direct ranking factors in Google’s search algorithm
- User Engagement: Better metrics correlate with higher engagement and lower bounce rates
- Conversion Rates: Faster, smoother experiences lead to higher conversion rates
- Mobile Experience: Particularly important for mobile users, who often have less patience for slow sites