Metrics per run

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

Tested 2025-06-18 11:55:18 using Firefox 139.0.1 (runtime settings).

Side by side

Metric12345MedianMeanstddevrsd
Google Web Vitals
Time to First Byte 643 ms 430 ms 636 ms 611 ms 551 ms611 ms574 ms79 ms13.77 %
First Contentful Paint 1.203 s 1.118 s 1.202 s 1.304 s 1.253 s1.203 s1.216 s62 ms5.08 %
Largest Contentful Paint 2.305 s 2.271 s 2.254 s 2.322 s 2.237 s2.271 s2.278 s32 ms1.38 %
Interaction to Next Paint 121.74 ms NaN s 112.56 ms 112.8 ms 134.14 ms117 ms120 ms9 ms7.31 %
Timing metrics
First Paint 1.314 s 1.119 s 1.305 s 1.312 s 1.269 s1.305 s1.264 s74 ms5.87 %
First Contentful Paint 1.203 s 1.118 s 1.202 s 1.304 s 1.253 s1.203 s1.216 s62 ms5.08 %
Largest Contentful Paint 2.305 s 2.271 s 2.254 s 2.322 s 2.237 s2.271 s2.278 s32 ms1.38 %
Load Event End 2.449 s 2.268 s 2.391 s 2.421 s 2.406 s2.406 s2.387 s63 ms2.62 %
Server Response Time 131 ms 125 ms 153 ms 150 ms 125 ms131 ms137 ms12 ms8.95 %
TTFB 643 ms 430 ms 636 ms 611 ms 551 ms611 ms574 ms79 ms13.77 %
Page Load Time 2.449 s 2.267 s 2.390 s 2.421 s 2.406 s2.406 s2.387 s63 ms2.63 %
First Visual Change 1.367 s 1.167 s 1.366 s 1.366 s 1.300 s1.366 s1.313 s77 ms5.90 %
Last Visual Change 3.400 s 3.367 s 3.400 s 3.500 s 3.433 s3.400 s3.420 s45 ms1.32 %
Speed Index 1.531 s 1.359 s 1.529 s 1.537 s 1.465 s1.529 s1.484 s68 ms4.57 %
Visual Readiness 2.033 s 2.200 s 2.034 s 2.134 s 2.133 s2.133 s2.107 s65 ms3.07 %
Visual Complete 95 2.300 s 2.300 s 2.300 s 2.366 s 2.233 s2.300 s2.300 s42 ms1.83 %
Visual Complete 99 2.300 s 2.300 s 2.300 s 2.366 s 2.233 s2.300 s2.300 s42 ms1.83 %
CPU metrics
Browser metrics
CPU benchmark score 52 ms 51 ms 51 ms 52 ms 51 ms51 ms51 ms0 ms0.95 %
Page metrics
DOM elements 9075 9075 9075 9075 90759075907500.00 %
Document height 34850 34850 34850 34850 34850348503485000.00 %
Total Requests 63 63 64 64 64646400.77 %
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 820.8 KB820.8 KB820.8 KB32 B0.00 %
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 KB0 b0.00 %
CSS Transfer Size 26.2 KB 26.2 KB 26.2 KB 26.2 KB 26.2 KB26.2 KB26.2 KB0 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 63 63 64 64 64646400.77 %
First Party Total Transfer Size 820.8 KB 820.8 KB 820.8 KB 820.8 KB 820.8 KB820.8 KB820.8 KB32 B0.00 %
First Party Total Content Size 0 b 0 b 0 b 0 b 0 b0 b0 b0 b0.00 %