Re: [eigen] Eigen 3 is extremely slow

[Hari Sundar <hsundar@xxxxxxxxx>]

I am using Visual Studio 2008 and have all optimizations turned on. I'll try to compile this with gcc and see if that improves performance.

I still find it very strange that it performs so poorly.

On Sun, Mar 13, 2011 at 8:58 PM, Robert Lupton the Good <rhl@xxxxxxxxxxxxxxxxxxx> wrote:

>> Any suggestions on what might be going wrong, or should I stick with blitz++
>> ?
>
> Do you compile with optimization? Without optimization Eigen can get really slow due to its heavy template machinery.

Older versions of g++ (e.g. 4.1.2) don't handle the heavy templating well either, even optimised.  4.2 is OK

                               R

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