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Sparse Matrix filling efficiency #43

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liupeiLu opened this issue Sep 27, 2018 · 2 comments
Open

Sparse Matrix filling efficiency #43

liupeiLu opened this issue Sep 27, 2018 · 2 comments

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@liupeiLu
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Hello,

I would like to know is there any speed difference between coeffRef(i,j) and mat.setFromTriplets(tripletList.begin(), tripletList.end()) for filling eigen sparse matrices? Currently I am using the former but it took a very long time to run the interpolate function.

Thanks for the help!
@alecjacobson
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alecjacobson commented Sep 27, 2018 via email

@liupeiLu
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setFromTriplets is mush faster, thank you!

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@alecjacobson @liupeiLu