I'm using SHA-1 to detect duplicates in a program handling files. It is not required to be cryptographic strong and may be reversible. I found this list of fast
pkzip
azure-storage-explorer
flask-restless
ccscene
mongoskin
cvs2git
equals
google-play-core
asp.net-mvc-areas
pipewire
cni
markup-extensions
mod-rewrite
react-starter-kit
tvos
apache-http-server
lerp
object-oriented-analysis
automapper-6
through2
video-encoding
amazon-polly
user-instance
helmet.js
google-cloud-network-load-balancer
variable-names
virtual-environment
database-permissions
dta
image-editor