Find a QR code with as few black dots as possible.

qrcodes.sh

#!/usr/bin/env bash
#
# Spoiler:
# $ ./qrcodes.sh | sort | head
# 416 http://7c.dblu.me
# 416 https://j.dblu.me
# 416 http://wc.dblu.me
# 420 http://2E.dblu.me
# 420 http://73.dblu.me
#
set -eu -o pipefail # See: https://sipb.mit.edu/doc/safe-shell/

f () {
    echo $(qrencode -t ASCII $1 | tr -cd '#' | wc -c) $1
}

for X in {a..z} {A..Z} {0..9}
do
    f http://dblu.me/$X
    f https://dblu.me/$X
    f http://dblu.me/$X/
    f http://$X.dblu.me
    f https://$X.dblu.me
    f http://$X.dblu.me/
    f http://$X.dlma.com
    f http://dlma.com/$X
    for Y in {a..z} {A..Z} {0..9}
    do
        f http://dblu.me/$X$Y
        f http://$X$Y.dblu.me
    done
done