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Total sample size

1,119

0.02% of all 6,971,970 URLs

Web Vitals
Origin-aggregated

First Contentful Paint:

(840 origins)
55% 55% of page loads have a good FCP (< 1.8s).
23% 23% of page loads need to improve FCP (1.8s - 3s).
22% 22% of page loads have a poor FCP (> 3s).
(840 origins)

Largest Contentful Paint:

(832 origins)
54% 54% of page loads have a good LCP (< 2.5s).
22% 22% of page loads need to improve LCP (2.5s - 4s).
24% 24% of page loads have a poor LCP (> 4s).
(832 origins)

Cumulative Layout Shift:

(828 origins)
73% 73% of page loads have a good CLS (< 0.1).
8% 8% of page loads need to improve CLS (0.1 - 0.25).
20% 20% of page loads have a poor CLS (> 0.25).
(828 origins)

First Input Delay:

(724 origins)
86% 86% of page loads have a good FID (< 100ms).
10% 10% of page loads need to improve FID (100ms - 300ms).
4% 4% of page loads have a poor FID (> 300ms).
(724 origins)

Time To First Byte:

(834 origins)
45% 45% of page loads have a good TTFB (< 500ms).
35% 35% of page loads need to improve TTFB (500ms - 1500ms).
20% 20% of page loads have a poor TTFB (> 1500ms).
(834 origins)

Compressed requests
941 urls

  • Gzip compressed
    57.4%
  • Brotli compressed
    22.9%
  • Not compressed
    19.7%

Total Bytes
1,119 urls

  • < 200 KB
    3.4%
  • 200 KB - 400 KB
    5.5%
  • 400 KB - 600 KB
    5.5%
  • 600 KB - 800 KB
    6.1%
  • 800 KB - 1MB
    6.6%
  • > 1 MB
    73.0%

{ } JavaScript Bytes
1,119 urls

  • < 200 KB
    16.4%
  • 200 KB - 400 KB
    23.2%
  • 400 KB - 600 KB
    15.0%
  • 600 KB - 800 KB
    13.3%
  • 800 KB - 1MB
    8.5%
  • > 1 MB
    23.6%

Image Bytes
1,119 urls

  • < 200 KB
    23.0%
  • 200 KB - 400 KB
    11.2%
  • 400 KB - 600 KB
    9.1%
  • 600 KB - 800 KB
    5.1%
  • 800 KB - 1MB
    4.1%
  • > 1 MB
    47.5%
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Data from HTTP Archive and Chrome User Experience Report

GitHub