NIntegrate
- To: mathgroup at smc.vnet.net
- Subject: [mg89176] NIntegrate
- From: Michael Weyrauch <michael.weyrauch at gmx.de>
- Date: Wed, 28 May 2008 04:45:19 -0400 (EDT)
- Reply-to: michael.weyrauch at gmx.de
Hello,
I evaluate in Mathematica 5.2
Timing[Do[NIntegrate[Sin[x], {x, 0., 1.}], {k, 10000}]]
{1.516 Second, Null}
Doing this on the same computer in Mathematica 6.0.2
Timing[Do[NIntegrate[Sin[x], {x, 0., 1.}], {k, 10000}]]
{84.5, Null}
which does not look like progress.
I realize that Mathematica 6.0.2 may use much more sophisticated
techniques than 5.2, therefore, I directed it what I think Mathematica
5.2 may use (??):
Timing[Do[NIntegrate[Sin[x], {x, 0., 1.},
Method -> {"GaussKronrodRule", "Points" -> 2,
"SymbolicProcessing" -> 0}], {k, 10000}]]
{21.391, Null}
Still not very convincing in comparison to 5.2.
What is going on here? And how can I direct Mathematica 6 to be as fast
as 5.2 in trivial cases as the example above?
Michael Weyrauch
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