Re: The same function the second time evaluated is faster. Why?
- To: mathgroup at smc.vnet.net
- Subject: [mg119101] Re: The same function the second time evaluated is faster. Why?
- From: Joseph Gwinn <joegwinn at comcast.net>
- Date: Sun, 22 May 2011 06:52:24 -0400 (EDT)
- References: <ir857q$beh$1@smc.vnet.net>
In article <ir857q$beh$1 at smc.vnet.net>, Guillermo Sanchez <guillermo.sanchez at hotmail.com> wrote: > Dear gurus? > > I evaluate the below function , > > Int[1]:=1+1 > > Int[2]:=Timing[(f2[x1_] := Integrate[Sin[x^3], {x, 0, x1}]; > f2[Range[10]]);] > Out[2]:= {12.261, Null} > > I repeat the evaluation is faster > > Out[2]:={1.389, Null} > > and the third faster > > Out[3]:= {0.281, Null} > > Even writting f3 instead f2 > > Timing[(f3[x1_] := Integrate[Sin[x^3], {x, 0, x1}]; f3[Range[10]]);] > {0.281, Null} > > Why the second and third evaluation are faster? > > Guillermo Because Mathematica caches intermediate results. Joe Gwinn