WebPerformance Report

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#WebPerf result for:

URL: https://www.redhat.com/en

From: Frankfurt, Germany - (Chrome) - Mobile

Date: 2025-06-20T21:17:15

ID: 250620_ZiDcRA_7RQ

Filmstrip - Video - Map - Opportunities - History - Frustration index (new)

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Optimization Scores

Grades for the most critical performance optimizations.

13 A+ A A
Lighthouse Perf (new)
Security score
First Byte Time
Keep-alive Enabled
A A F ✓
Compress Transfer
Compress Images
Cache static content
Effective use of CDN
View Performance Optimization Overview

Perf Links

Great posts about web tech.

⚡️ Measuring LCP in SPA [speedkit]

⚡️ Firefox quietly starts testing Perplexity AI [9to5mac]

⚡️ JavaScript broke the web [jonoalderson]

⚡️ You can now build carousels with CSS! [mozilla]

Core Web Vitals

UX Metrics for loading, visual stability, and interactivity.

LCP
CLS
TBT
8.370s 0.912 1.319s
LCP - CrUX
CLS - CrUX
INP - CrUX
TTFB - CrUX (new)
3.720s 0.090 0.211s 0.957s
View Web Vitals Diagnostic

Lighthouse Scores

Diagnose performance issues - 3G Fast connection.

Performance
Accessibility
Best Practices
SEO
13 86 96 86
View Lighthouse Report

Performance Results

High-level metrics information about the page that was tested.

First Byte
Start Render
FCP
Speed Index
0.716s 4.000s 4.027s 6.172s

Document Complete

Time
Requests
Bytes In
9.041s 88 807 KB

Fully Loaded

Time
Requests
Bytes In
9.261s 89 809 KB

Content Breakdown

Website content breakdown by MIME type.

MIME Type
Requests
Bytes
js 61 362KB
css 7 35KB
image 12 298KB
font 2 59KB
html 3 52KB
View Full Test in WebPageTest.org