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From: adkins@carp.cis.ohio-state.edu (Brian Adkins)
Newsgroups: comp.lang.c
Subject: Re: # to the nth power
Message-ID: <85764@tut.cis.ohio-state.edu>
Date: 8 Nov 90 15:23:28 GMT
References: <9750@helios.TAMU.EDU> <1990Nov1.232830.17131@NCoast.ORG> <1990Nov3.220554.19404@zoo.toronto.edu> <226@smds.UUCP> <P1X6QN1@xds13.ferranti.com> <1990Nov7.020445.12839@lotus.com>
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Reply-To: Brian Adkins <adkins@cis.ohio-state.edu>
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In article <1990Nov7.020445.12839@lotus.com> blambert@lotus.UUCP (Brian Lambert) writes:
>>> 	for (y=x,sqrtx=1;y>0;) {ysave = y;y =/ 16;sqrtx =* 4;}
>It's because programs that take up fewer lines of vertical space also
>consume less CPU time.
>Brian Lambert

Mr. Lambert, do you really believe that the following two routines 
consume different amounts of CPU time?

for (y=x,sqrtx=1;y>0;) {
  ysave = y;
  y /= 16;
  sqrtx *= 4;
}

for (y=x,sqrtx=1;y>0;) {ysave = y;y /= 16;sqrtx *= 4;}

Please correct me if I am mistaken, but I believe any compiler will generate
the same code for both of these routines.

Brian Adkins