On 11/30/09, Claudio Martella
Hello list,
I'm trying to calculate point-wise product from a MultiArray (basically the adjacency list from the boost graph). Can anybody suggest how the point-wise product can be calculated in boost in the most efficient way (of course i can implement the function myself with a nested for())?
For those not familiar with point-wise product, it's defined as:
A[i,j] = B[i,j] * C[i,j]
I would answer definitively "it depends." It is likely speed will be limited by caching on an ia32 machine and preservinb locality will be a high-priority. So, overall performance probably also depends on what other stuff you are doing and trying to do things in blocks. So, I guess I'd be asking the boost people to address memory allocation strategies in answer to this question. I think most people can avoid VM but memory hierarchy may not always be considered.
TIA
/CM
-- Claudio Martella Digital Technologies Unit Research & Development - Analyst
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