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Total sample size

1,258

0.02% of all 6,971,970 URLs

Web Vitals
Origin-aggregated

First Contentful Paint:

(1,086 origins)
55% 55% of page loads have a good FCP (< 1.8s).
23% 23% of page loads need to improve FCP (1.8s - 3s).
21% 21% of page loads have a poor FCP (> 3s).
(1,086 origins)

Largest Contentful Paint:

(1,076 origins)
56% 56% of page loads have a good LCP (< 2.5s).
23% 23% of page loads need to improve LCP (2.5s - 4s).
21% 21% of page loads have a poor LCP (> 4s).
(1,076 origins)

Cumulative Layout Shift:

(1,075 origins)
58% 58% of page loads have a good CLS (< 0.1).
9% 9% of page loads need to improve CLS (0.1 - 0.25).
33% 33% of page loads have a poor CLS (> 0.25).
(1,075 origins)

First Input Delay:

(880 origins)
87% 87% of page loads have a good FID (< 100ms).
9% 9% of page loads need to improve FID (100ms - 300ms).
4% 4% of page loads have a poor FID (> 300ms).
(880 origins)

Time To First Byte:

(1,077 origins)
53% 53% of page loads have a good TTFB (< 500ms).
28% 28% of page loads need to improve TTFB (500ms - 1500ms).
20% 20% of page loads have a poor TTFB (> 1500ms).
(1,077 origins)

Compressed requests
1,077 urls

  • Gzip compressed
    74.2%
  • Brotli compressed
    8.7%
  • Not compressed
    17.1%

Total Bytes
1,258 urls

  • < 200 KB
    0.2%
  • 200 KB - 400 KB
    1.2%
  • 400 KB - 600 KB
    11.4%
  • 600 KB - 800 KB
    6.5%
  • 800 KB - 1MB
    5.5%
  • > 1 MB
    75.2%

{ } JavaScript Bytes
1,258 urls

  • < 200 KB
    25.0%
  • 200 KB - 400 KB
    11.9%
  • 400 KB - 600 KB
    14.6%
  • 600 KB - 800 KB
    8.7%
  • 800 KB - 1MB
    5.1%
  • > 1 MB
    34.8%

Image Bytes
1,258 urls

  • < 200 KB
    26.0%
  • 200 KB - 400 KB
    8.0%
  • 400 KB - 600 KB
    6.4%
  • 600 KB - 800 KB
    4.5%
  • 800 KB - 1MB
    4.0%
  • > 1 MB
    51.1%
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Data from HTTP Archive and Chrome User Experience Report

GitHub