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Re: Odd behavior of time-domain convolutions
From: |
John W. Eaton |
Subject: |
Re: Odd behavior of time-domain convolutions |
Date: |
Wed, 05 Sep 2007 14:57:18 -0400 |
On 5-Sep-2007, Quentin Spencer wrote:
| John W. Eaton wrote:
| > On 5-Sep-2007, Quentin Spencer wrote:
| >
| > | I've used the wrapper
| > | approach before where the only difference was the interface code, and
| > | even then the mex code was a little faster, but not by the large margins
| > | you are observing.
| >
| > I'm surprised by that becuase I think more work has to be done to set
| > up and recover from calling a function with the MEX interface. Also,
| > in some cases copies of the data passed to and from a MEX file are
| > required when no copy is needed with the .oct file interface.
|
| It may be that my problem was what David pointed out--using the indexing
| functions that bring in a lot of extra overhead.
You say that the only difference is the inteface code. Did the
interface code perform indexing on Array/Matrix values?
jwe