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parcellfun (or cellfun) overhead
From: |
Daniel Arteaga |
Subject: |
parcellfun (or cellfun) overhead |
Date: |
Tue, 01 Feb 2011 11:43:48 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; ca-ES; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 |
Hi,
I paralellize a piece of code in the following way:
anonyFunc = @(x) func(x, paramStruct);
splB = parcellfun(nThreads, anonyFunc, dataCell);
where "paramStruct" is a very large structure array (70000 elements),
and "dataCell" contains each one of the imput data.
The function "func" takes takes around 50 ms, (measured with tic-toc),
but when calling it with parcellfun it takes much longer, around 500 ms.
Same happens when replacing parcellfun with cellfun.
I suspect that this is due to the large size of paramStruct, because
this does not happen when replacing "func" by a dummy function.
Any ideas of how could improve the situation?
Many thanks in advance,
Daniel Arteaga