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Find unminified CSS and JS files

harmlessImages and performancedebian, ubuntu
Adjust the values, the command updates live
user@server
find /var/www/vhosts/example.com/httpdocs/wp-content -type f \( -name '*.css' -o -name '*.js' \) ! -name '*.min.*' -size +20k -exec sh -c 'echo "$(wc -l < "$1") $1"' sh {} \; | awk -v n=200 '$1 > n' | sort -rn | head -30

Searches for CSS and JS files above a minimum size in kilobytes that do not end in .min.css or .min.js, and shows those with more lines than the threshold. Minified files usually consist of very few long lines, while many lines suggest readable source code. This is a heuristic, only the page source shows whether the file is actually served.

Note: Many plugins ship both variants and serve only the minified one. Caching plugins often minify only at delivery time.

Also searched as

  • find unminified css files
  • javascript not minified
  • pagespeed minify css
  • find large js files in theme

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Convert images to AVIF recursively

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' \) -exec sh -c 'for f; do [ -e "$f.avif" ] || avifenc -s 6 "$f" "$f.avif" >/dev/null; done' sh {} +
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Convert images to WebP recursively

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' \) -exec sh -c 'for f; do [ -e "$f.webp" ] || cwebp -quiet -q 80 "$f" -o "$f.webp"; done' sh {} +
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Find large images in wp-content/uploads

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' -o -iname '*.gif' -o -iname '*.webp' \) -size +500k -printf '%s\t%p\n' | sort -rn | head -50 | numfmt --field=1 --to=iec
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'
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Find web font files and their size

$find /var/www/vhosts/example.com/httpdocs/wp-content -type f \( -iname '*.woff2' -o -iname '*.woff' -o -iname '*.ttf' -o -iname '*.otf' -o -iname '*.eot' \) -printf '%s\t%p\n' | sort -rn | head -30 | numfmt --field=1 --to=iec
harmlessImages and performance

Optimize JPEG images losslessly with jpegoptim

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' \) -exec jpegoptim --strip-all --preserve {} +
cautionImages and performance

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