Cron job to decrease CPU usage in nginx with gzip_static enabled.

compress-statics.sh

#!/bin/bash

for ext in css js
do
    find /var/www -type f -name "*.${ext}" | while read f
    do
        gzip -c9 "$f" > "$f.gz.new"
        diff "$f.gz.new" "$f.gz" 2>/dev/null && rm -f "$f.gz.new" || mv -vf "$f.gz.new" "$f.gz"
    done
done