Re: [eigen] eigen sqrt compilation error

[Benoit Jacob <jacob.benoit.1@xxxxxxxxx>]

2009/6/19 Patrick Mihelich <patrick.mihelich@xxxxxxxxx>
>
> On Fri, Jun 19, 2009 at 5:50 AM, Benoit Jacob <jacob.benoit.1@xxxxxxxxx> wrote:
>>
>> The #include<Eigen/Array> increases compilation times by 2.5% and the
>> memory usage is not affected.
>
> 2.5 percent on a simple test program?

Simple, but realistic, not just an abstract test program. It makes a
decent number of instantiations, so i think that it is a real use
case. So real users who would lose 2.5% of compilation speed if we
just merged Array into Core.

There's another little thing that bugs me: if we merge Array into Core
for the reason that it doesn't slow compilation down much, then in the
future we'll be more reluctant to add more features to Array (like how
we're conservative with Core). As long as Array is separate, we feel
more free...

Finally I wonder how much of a use there still is for a combined
Core+Array, now that there is the Dense header.

(None of what i say here is a stong opinion...)

Benoit