`cputime', `tstart', `tstop'
----------------------------

cputime(ONOFF)
     :: $B0z?t$,(B 0 $B$J$i$P(B `cputime' $B$NI=<($r;_$a$k(B.
     $B$=$l0J30$J$i$PI=<($r9T$&(B.

tstart()
     :: CPU time $B7WB,3+;O(B.

tstop()
     :: CPU time $B7WB,=*N;$*$h$SI=<((B.

RETURN
     0

ONOFF
     $B%U%i%0(B ($BG$0U(B)

   * `cputime()' $B$O(B, $B0z?t$,(B 0 $B$J$i$P(B CPU time $B$NI=<($r;_$a$k(B.
     $B$=$l0J30$J$i$PI=<($r9T$&(B.

   * `tsart' $B$O0z?t$J$7(B, `()' $B$J$7$G(B, CPU time $B7WB,$r3+;O$9$k(B.

   * `tstop' $B$O0z?t$J$7(B, `()' $B$J$7$G(B, CPU time $B7WB,$r=*N;(B,
     $B$*$h$SI=<($9$k(B.

   * `cputime(ONOFF)' $B$O(B `ctrl("cputime",ONOFF)' $B$HF1$8$G$"$k(B.

   * `tstart', `tstop' $B$O(B, $BF~$l;R$K$7$F;H$o$l$k$3$H$OA[Dj$7$F$$$J$$(B
     $B$?$a(B, $B$=$N$h$&$J2DG=@-$,$"$k>l9g$K$O(B, `time()' $B$K$h$k7WB,$r9T$&(B
     $BI,MW$,$"$k(B.

   * `cputime()' $B$K$h$k(B on, off $B$O(B, $BC1$KI=<($N(B on, off $B$G$"$j(B,
     $B%H%C%W%l%Y%k(B $B$N0l$D$NJ8$KBP$9$k7WB,$O>o$K9T$o$l$F$$$k(B. $B$h$C$F(B,
     $B7W;;$r;O$a$F$+$i$G$b(B, $B7W;;=*N;A0$K%G%P%C%,$KF~$C$F(B `cputime(1)'
     $B$r<B9T$5$;$l$P7W;;;~4V$O(B $BI=<($5$l$k(B.

     [49] tstart$
     [50] fctr(x^10-y^10);
     [[1,1],[x+y,1],[x^4-y*x^3+y^2*x^2-y^3*x+y^4,1],[x-y,1],
     [x^4+y*x^3+y^2*x^2+y^3*x+y^4,1]]
     [51] tstop$
     80msec + gc : 40msec

$B;2>H(B
     *Note `time': time, *Note `ctrl': ctrl.

