pokey@well.UUCP (Jef Poskanzer) (02/26/89)
Geez, talk about re-inventing the square wheel! --- Jef
vixie@decwrl.dec.com (Paul A Vixie) (02/27/89)
Synopsis: "du -a" is not faster than "find . -print", at least on Ultrix. Explaination: there isn't any reason for either to be faster since they both do the same thing -- recursively descend a directory hierarchy, doing a stat(2) on each name found in each directory. Note that find has to do a stat(2) on each name even if it's only going to print the names, since it has to know whether the file is a directory (which would need to be descended into). I ran "find . -print", "du -a", and "ls -lR" in my home directory (which has 5,326 files in it). I ran them a few times to make sure the inodes were all in the cache. Detail: % time find . -print > /dev/null 0.4u 3.5s 0:04 100% 70+104k 1+1io 0pf+0w % time du -a > /dev/null 1.3u 3.5s 0:04 103% 13+57k 0+0io 0pf+0w % time ls -1R > /dev/null 2.6u 4.3s 0:06 101% 69+160k 0+4io 0pf+0w -- Paul Vixie Work: vixie@decwrl.dec.com decwrl!vixie +1 415 853 6600 Play: paul@vixie.sf.ca.us vixie!paul +1 415 864 7013