Date: Thu, 8 Jul 2004 09:32:51 -0700 From: David Schultz <das@FreeBSD.ORG> To: Wilko Bulte <wkb@freebie.xs4all.nl> Cc: Daniel Ellard <ellard@eecs.harvard.edu> Subject: Re: Article on Sun's DTrace Message-ID: <20040708163251.GA8862@VARK.homeunix.com> In-Reply-To: <20040708133951.GA67667@freebie.xs4all.nl> References: <20040706120130.3DF9816A57D@hub.freebsd.org> <40EB9A46.2050409@trio.plala.or.jp> <20040708034845.GA59801@VARK.homeunix.com> <20040708033741.E28518@bowser.eecs.harvard.edu> <20040708082304.GE5238@silverwraith.com> <20040708133951.GA67667@freebie.xs4all.nl>
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On Thu, Jul 08, 2004, Wilko Bulte wrote: > On Thu, Jul 08, 2004 at 01:23:04AM -0700, Avleen Vig wrote: > > On Thu, Jul 08, 2004 at 03:46:24AM -0400, Daniel Ellard wrote: > > > I don't doubt that DTrace took a long time to do. However, in most > > > projects the design phase consumes a lot of time, and it is often the > > > case that unforeseen problems or changes in the feature set cost the > > > developers a lot of time. So while it might have taken six years to > > > write DTrace the first time, I suspect it would take a fraction of > > > that time to re-implement. (It certainly might be longer than "a few > > > months" and I'm not going to quibble. We won't know the precise > > > number until someone does the port.) > > > > They said "6 staff-years". This means if they have 6 people working on > > it full time, it took 1 year to complete. If they had 60 people full > > time, it took just over 5 weeks (technically, i doubt that would work > > practically). > > It works about as well as having 3 women deliver a baby in 3 months. ;-) See also Fred Brooks' book _The_Mythical_Man-Month_. But if you *do* happen to know 60 good programmers who are willing to work on FreeBSD full time for very little money, let me know and I'll see what I can do about that baby thing.
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