Howto clone an SD-card

How to clone an SD-card?

~$ sudo dd if=/dev/mmcblk0 of=image.img bs=4M status=progress
5783945216 bytes (5,8 GB, 5,4 GiB) copied, 81,031 s, 71,4 MB/s
[...]
3835+1 records in
3835+1 records out
16088301568 bytes (16 GB, 15 GiB) copied, 247,23 s, 65,1 MB/s
~$ sudo dd of=/dev/mmcblk0 if=image.img bs=4M status=progress
[...]
3835+1 records in
3835+1 records out
16088301568 bytes (16 GB, 15 GiB) copied, 1173,38 s, 13,7 MB/s

Took 24 minutes! (>.<)