Hi, On 07/05/15 15:02, Daniel Peebles wrote: > No need to read all the files, right? You import them lazily based on what > readDir returns. Yes, but you still need to traverse the directory tree, which itself takes a long time on non-SSD disks. -- Eelco Dolstra | LogicBlox, Inc. | http://nixos.org/~eelco/