Metrics per run

https://en.wikipedia.org/wiki/ChatGPT

Tested 2025-06-18 14:55:32 using Firefox 139.0.1 (runtime settings).

Side by side

Metric12345MedianMeanstddevrsd
Google Web Vitals
Time to First Byte 645 ms 603 ms 625 ms 425 ms 478 ms603 ms555 ms87 ms15.73 %
First Contentful Paint 1.304 s 1.288 s 1.287 s 1.016 s 1.389 s1.288 s1.257 s126 ms10.04 %
Largest Contentful Paint 2.182 s 2.254 s 2.290 s 2.182 s 2.373 s2.254 s2.256 s72 ms3.18 %
Interaction to Next Paint 136.54 ms 111.96 ms 122.1 ms 116.72 ms 187.12 ms122 ms135 ms27 ms20.30 %
Timing metrics
First Paint 1.322 s 1.293 s 1.293 s 1.121 s 1.396 s1.293 s1.285 s90 ms7.02 %
First Contentful Paint 1.304 s 1.288 s 1.287 s 1.016 s 1.389 s1.288 s1.257 s126 ms10.04 %
Largest Contentful Paint 2.182 s 2.254 s 2.290 s 2.182 s 2.373 s2.254 s2.256 s72 ms3.18 %
Load Event End 2.308 s 2.351 s 2.439 s 2.280 s 2.517 s2.351 s2.379 s87 ms3.68 %
Server Response Time 152 ms 151 ms 154 ms 125 ms 166 ms152 ms150 ms13 ms8.97 %
TTFB 645 ms 603 ms 625 ms 425 ms 478 ms603 ms555 ms87 ms15.73 %
Page Load Time 2.308 s 2.350 s 2.439 s 2.279 s 2.517 s2.350 s2.379 s88 ms3.69 %
First Visual Change 1.400 s 1.366 s 1.366 s 1.200 s 1.433 s1.366 s1.353 s80 ms5.95 %
Last Visual Change 3.366 s 3.433 s 3.400 s 3.300 s 3.533 s3.400 s3.406 s77 ms2.26 %
Speed Index 1.540 s 1.533 s 1.531 s 1.372 s 1.601 s1.533 s1.515 s76 ms5.03 %
Visual Readiness 1.966 s 2.067 s 2.034 s 2.100 s 2.100 s2.067 s2.053 s50 ms2.44 %
Visual Complete 95 2.200 s 2.300 s 2.300 s 2.200 s 2.400 s2.300 s2.280 s75 ms3.28 %
Visual Complete 99 2.200 s 2.300 s 2.300 s 2.200 s 2.400 s2.300 s2.280 s75 ms3.28 %
CPU metrics
Browser metrics
CPU benchmark score 51 ms 51 ms 51 ms 51 ms 51 ms51 ms51 ms0 ms0.00 %
Page metrics
DOM elements 9075 9075 9075 9075 90759075907500.00 %
Document height 34850 34850 34850 34850 34850348503485000.00 %
Total Requests 64 64 64 64 63646400.63 %
HTML Requests 1 1 1 1 11100.00 %
JavaScript Requests 8 8 8 8 88800.00 %
CSS Requests 2 2 2 2 22200.00 %
Font Requests 0 0 0 0 00000.00 %
HTTP Errors 0 0 0 0 0000N/A
Total Transfer Size 820.8 KB 820.8 KB 820.8 KB 820.8 KB 818.3 KB820.8 KB820.3 KB1011 B0.12 %
HTML Transfer Size 135.3 KB 135.3 KB 135.3 KB 135.3 KB 135.3 KB135.3 KB135.3 KB0 b0.00 %
JavaScript Transfer Size 288.3 KB 288.3 KB 288.3 KB 288.3 KB 288.3 KB288.3 KB288.3 KB9 B0.00 %
CSS Transfer Size 26.2 KB 26.2 KB 26.2 KB 26.2 KB 26.2 KB26.2 KB26.2 KB1 B0.00 %
Font Transfer Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %
Favicon Transfer Size 2.0 KB 2.0 KB 2.0 KB 2.0 KB 2.0 KB2.0 KB2.0 KB0 b0.00 %
SVG Transfer Size 40.6 KB 40.6 KB 40.6 KB 40.6 KB 40.6 KB40.6 KB40.6 KB0 b0.00 %
Total Content Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %
HTML Content Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %
JavaScript Content Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %
CSS Content Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %
Image Content Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %
Font Content Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %
Favicon Content Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %
SVG Content Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %
Third Party metrics
First Party metrics
First Party Requests 64 64 64 64 63646400.63 %
First Party Total Transfer Size 820.8 KB 820.8 KB 820.8 KB 820.8 KB 818.3 KB820.8 KB820.3 KB1011 B0.12 %
First Party Total Content Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %