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Date: Thu, 30 Jan 1997 15:44:14 +0900
From: "Naoki Kobayashi" <shibata@geo.titech.ac.jp>
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Subject: [FreeBSD-users-jp 9272] Re: performance on numerical calculationdepends
	 on shells?
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$B>.NS!wCOOG!%El9)Bg$G$9!%(B

$B;3K\$5$s!$1|;3$5$s!$$[$=$+$o$5$s!$?@ED$5$sB>8f;XFn$$$?$@$-$"$j$,$H$&$4(B
$B$6$$$^$9!%(B

$B!t(B $B;R$I$b$,G.$r=P$7$F?29~$s$G$$$k$N$G<+Bp$+$i(B $BCY$$!*(B $BC<Kv$rDL$7$F=q$$(B
$B$F$$$^$9!%0zMQ$r$5$\$j$^$9$,!$8fMF<O$/$@$5$$!%(B

[9260]
$B1|;3$5$s(B stack $B$N<h$jJ}$K$D$$$F$OJY6/$K$J$j$^$7$?!%%f!<%6!<$,(B initial 
$B$N(B stack $BMFNL$r;XDj$9$kJ}K!$O$J$$$N$G$7$g$&$+!%$&$^$/$9$l$P(B 50 $BIC$h$j(B
$BB.$/$9$k$3$H$b2DG=$J$s$G$9$M!%(B

[9261]
$B$[$=$+$o$5$s30ItE*$K(B static double rx[n], ... $B$H$$$&@k8@$r$9$l$P>o$K(B
100 $BIC$K$J$j$^$9!%(Bmalloc() $B$GNN0h$r<h$C$?>l9g$HF1MM$G$9!%$?$@(B malloc()
$B$NJ}$,(B 70 $B!A(B 80 $BIC$N<B9T;~4V$G$9$_$^$9!%(B

[9266]
$B;3K\$5$s!$ITJY6/$J;d$N$?$a$K8x3+9V:B$rB3$1$F2<$5$$(B(^^) $B$H$3$m$G<ALd$N(B
$B7o$G$9$,(B shell2 $B$,(B shell1 $B$h$j>o$KB.$$$3$H$O$"$j$^$;$s!%(Bshell1 $B$,B.$/(B
$B$F;R(B shell $B$,CY$$>l9g$b$"$j$^$9!%(B1:2 $B$H=q$$$?$N$O(B tcsh:bash $B$H$$$&0UL#(B
$B$G$O$J$/(B shell $B$rJQ$($k$3$H$G<B9T;~4V$,(B 50s or 100s $B$K$J$k$H$$$&$3$H$G(B
$B$9!%;d$N?H6a$J(B P6 4 $BBf$N$I$l$b(B 50s $B$H(B 100s $B$H$$$&CM$r(B shell $B$K$h$C$F=P(B
$B$7$^$9!%FCDj$N(B shell $B$,(B 50s $B$H8@$C$F$$$k$N$G$O$"$j$^$;$s!%(Bshell $B$rJQ$((B
$B$k$3$H$GF~$j9~$`(B($B$=$N7k2L$r@8$_=P$9(B)$BMW0x$r65$($F$$$?$@$-$?$$$N$G$9!%$=(B
$B$NMW0x$N0l$D$H$7$F(B library $B$N%-%c%C%7%e$NLdBj$r;XE&$5$l$^$7$?$,!$$=$l(B
$B$@$1$G$b$J$$$H9M$($F$$$^$9!%0JA0(B static link $B$7$?>l9g$N7WB,$r$7$^$7$?(B
$B$,$d$O$j(B 50s or 100s $B$H$$$&7k2L$rF@$F$$$^$7$?!%0J2<$O(B tcsh, bash $B$H$$(B
$B$&%f!<%6!<$r:n$C$F7W;;$7$?7k2L$G$9!%(Btcsh $B7/$O(B tcsh $B$r(B bash $B7/$O(B bash 
$B$r%m%0%$%s%7%'%k$H$7$?%f!<%6!<$G$9!%N>J}$H$b(B telnet $BD>8e$K7WB,$7$^$7$?!%(B

> whoami
tcsh
> cc -static -O2 -DRUN -DN=20 nbody.c -o tbody
> /usr/bin/time ./tbody
       55.41 real        52.60 user         0.02 sys

bash$ whoami
bash
bash$ cc -static -O2 -DRUN -DN=20 nbody.c -o bbody
bash$ /usr/bin/time ./bbody
      109.71 real       108.01 user         0.04 sys

$B$3$NJ}K!$7$+;W$$$D$-$^$;$s$G$7$?$,B>$KNI$$J}K!$,$"$k$N$G$7$g$&$+!%(B

[9267]
$B?@ED$5$s!$0lBNHk9&$H$O$J$s$G$7$g$&$M!%(B

---------------
Naoki Kobayashi
Department of Earth and Planetary Sciences, Tokyo Institute of Technology
2-12-1 Ookayama, Meguro, Tokyo 152, JAPAN
TEL: +81-3-5734-2717 FAX: +81-3-5499-4093 E-mail: shibata@geo.titech.ac.jp
