It maintains its own index of apps and the filesystem in process and it ends up being 5-9x faster than mdfind. App search is nearly instantaneous and file search across the entire home directory takes ~100-150ms.
I've focused on just replicating spotlight's functionality and don't plan to add more features like workflows or plugins since I personally don't have a use for them. This is really about just having a fast way to search apps and files that works well.
https://floodlight.vmg.dev/ https://github.com/vmg-dev/floodlight