Complexity of reallocating storage (was users command crap)
Dan Bernstein
brnstnd at kramden.acf.nyu.edu
Sat Feb 2 18:16:06 AEST 1991
In article <2886 at charon.cwi.nl> dik at cwi.nl (Dik T. Winter) writes:
> Ah, but that is the problem. Just as fast comes in flavors. You have CPU
> time, real time, IO time and some more. If one of the programs uses more
> passes it is not equally fast IO time wise (unless you are using SSD on
> a Cray of course). (Moreover, a program doing IO might well block another
> program that wants to do IO.)
See, you're proving my point. You don't really care about the number of
passes; you care about speed (including any effect on the speed of other
programs). It's simply not true that any program using more passes must
use more time; that's only a rule of thumb.
Suppose you're given two programs, one of which uses fewer passes but is
twice as slow. Which do you really care about: the number of passes, or
the speed?
---Dan
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