#core-web-vitals

3 one-liners with this tag.

Find images without a loading attribute on a page

$curl -s https://example.com/ | tr '\n' ' ' | grep -oiE '<img[^>]*>' | grep -vi 'loading='

harmlessImages and performance

Find scripts without async or defer on a page

$curl -s https://example.com/ | tr '\n' ' ' | grep -oiE '<script[^>]*src=[^>]*>' | grep -viE 'async|defer|type=.?module'

harmlessImages and performance

Measure TTFB repeatedly with minimum, median and maximum

$for i in $(seq 10); do curl -o /dev/null -s -w '%{time_starttransfer}\n' https://example.com/; done | LC_ALL=C sort -n | awk '{a[NR]=$1; s+=$1} END {printf "Min: %.3fs Median: %.3fs Max: %.3fs Schnitt: %.3fs\n", a[1], a[int((NR+1)/2)], a[NR], s/NR}'

harmlessSEO checks