Messages in this thread | | | Date | Fri, 25 Jun 1999 23:36:51 +0200 | From | Jamie Lokier <> | Subject | Re: bottom-up mtimes (was Re: (reiserfs) Re: I discussed reading . . .) |
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Kragen Sitaker wrote: > Somebody wrote: > > Next [for W2K emulation] files need to be able to inherit stat data, so > > that a file can share its modification time with its parent > > directory, so that modifying the file changes the mod time on the > > directory. > > This opens some interesting possibilities: > - - find could be implemented in terms of locate (except for -atime) > - - so find would run in time proportional to the number of files you had > updated since the last updatedb, instead of time proportional > to the number of files on your disk. This is likely to be even > more useful as filesystems expand from millions of files to > hundreds of millions of files (if reiserfs takes off).
- Recursive makes can be made much faster too. - Believe me when I say _much_ faster ;-) - `find' can be used to speed up recursive makes - but for a really big project the `find' time still dominates overall build time. (Like _20 minutes_ to find all the changed files in a source tree -- my fault for having 200,000 sources I guess ;-)
-- Jamie
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