12-15-2010
The performance of the "find" program itself is pretty consistent across various editions of unix.
The Linux "locate" command is quick because it maintains a file index (similar to the Windows Search option) but maintaining this index itself becomes an issue on fast-changing systems.
Back to "find".
Given knowledge of the contents and structure of the filesystems it is a last resort to issue a "find" from root. Even then you need the "-follow" (links) switch to force "find" to search everywhere - thought this can cause "find" to report the same file more than once where there are linked directories.
On a mature O/S you could find yourself trawling through hundreds of thousands of irrelevant files and directories (like patch repositories etc.) or even files on other computers when NFS is involved.
Take note of the "-xdev" parameter to "find" (sometimes called "-mount" on old versions) which confines your "find" to a single filesystem.
Look at the inode count from "df -i" (or "bdf -i") to see how maby inodes are in use on each filesystem. This could explain some speed differences which cannot be accounted for by hardware differences or filesystem type.
Say if you are only interested in files in say "/home" issue "find /home -xdev " not "find /" .
Last edited by methyl; 12-15-2010 at 08:28 AM..
Reason: typos
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