Thanks for the details! I have tough about hash maps but actually not
about simultaneous requests... this seems quite bad tho. (if you have
more than a few hundreds users?)
I know it is insecure, but I would store everything in a txt file where each
line is a link.
Why is that insecure?
Because you can just fetch every shorted links by "bruteforce". this is
"insecure" in the sense that it is not "private".
If you don't want your id to be consecutive, a tsv file would do the trick
with a hash then the link.
BINGO
I suppose that this doesn't help with complexity tho...
