"need a quick hashing method"

[Arthur Bela]

HDD#1
HDD#2

I copy files between HDD#1 and HDD#2.

When i finish, i need a quick "hasing method" - i just want to check,
that the copy was 100% ok.

md5sum, sha256sum is slow -> are there any "very fast" hash algoritms?
- just for checking if the copied file is corrupt or not [i just need
to know, if there were even 1 Byte error when copying]

i can write the script, that checks the files, i just need a hash
algoritm [""software/command""], that is fast enough.

Thank you!