Re: [eigen] eigen sqrt compilation error |

[ Thread Index | Date Index | More lists.tuxfamily.org/eigen Archives ]

*To*: eigen@xxxxxxxxxxxxxxxxxxx*Subject*: Re: [eigen] eigen sqrt compilation error*From*: Benoit Jacob <jacob.benoit.1@xxxxxxxxx>*Date*: Fri, 19 Jun 2009 20:22:51 +0200*Dkim-signature*: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=WWjN0GDHdaz1ct89Gt4HRuqzeCdSXFkqOR/WJyzQ3dA=; b=TFpbOqQsy9nqJeNoRr0wkr9UuOkwCxeJhV2v6DNShkKeXkbwf5SWvj3UZQ/jUPDP5+ niZFT1sYJovifAabvjMMYaHowoRL4hhqf2xTyEuOnn20GK85F4LoOM3NiR+drzGr6DZ0 GOxtgrgEYxsMP8PEu5G4YlrvygIN72zS0JFXw=*Domainkey-signature*: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; b=R1rzOgUQCrJ5T80aWjpcosoUZw97Cu8Ik4lk5alXWtXnNcbzrY7VciGA8TPXfoOpri BfKtMajFC282UbZ5IJplKX27Q/tcQj6//87tC8RmHwpMZlyG7dygYwG3aSRZrZG3K0xb W57aVvcXfRwdyZcGnY74L5RhrgceHB7JxEQWo=

OK to add Eigen/Eigen including at least "Dense" and "Sparse". But I'm not sure if it should include StdVector and QtAlignedMalloc. for QtAlignedMalloc I don't even understand how it works? i mean how can it define functions that are already defined by Qt? is it meant to be included before or after Qt or is that irrelevant? Benoit 2009/6/19 Mark Borgerding <mark@xxxxxxxxxxxxxx> > > May I suggest Eigen/Eigen include ALL functionality that is considered stable and part of the "official" Eigen. > I think speeding up compile times is less important than making an easy to use interface. If a developer is concerned with their compile times, they can notice an entry in the FAQ that tells them how to speed things up (selecting a subset of headers, precompiled header options?...) . > > Caveat: I'm an Eigen newcomer and so I am unencumbered by knowledge of the specific issues :) > > -- Mark > > > > Benoit Jacob wrote: >> >> Finally, I added a Eigen/Dense header, including all the dense >> functionality, but not Sparse, and not the workaround files >> QtAlignedMalloc, StdVector. >> >> Rationale: >> - this is only 15% slower than Core on my test, while it becomes 35% >> slower than Core if I also include Sparse. >> - we can still offer Eigen/Eigen alongside if you still think it's >> needed. It would include Dense and Sparse, but still not the >> workaround files. For that reason it's a bit misleading : the name >> Eigen/Eigen suggests that all is included. Tell us if you still want >> Eigen/Eigen. >> >> Benoit >> >> 2009/6/19 Rohit Garg <rpg.314@xxxxxxxxx> >> >>> >>> PLEASE include the nuclear option. I like that. >>> >>> On Fri, Jun 19, 2009 at 6:13 AM, Mark Borgerding<mark@xxxxxxxxxxxxxx> wrote: >>> >>>> >>>> I like this. >>>> * easy to get everything from Eigen you could possibly want with one include >>>> * possible to go through the trouble of minimizing compile time or source >>>> file dependencies. >>>> It seems like a good philosophy. >>>> >>>> Guido Von Rossum is fond of saying "Make the easy things easy. Make the hard >>>> things possible." >>>> -- Mark >>>> >>>> >>>> Benoit Jacob wrote: >>>> >>>>> >>>>> oh and there is another "nuclear option": >>>>> >>>>> add a convenience #include<Eigen/Eigen> that includes them all. And >>>>> then keep the separate headers for the users who want every % of >>>>> compilation speed. >>>>> >>>>> The idea is that Core and Array are the 2 biggest modules, so >>>>> Eigen/Eigen won't be much slower than including them two. >>>>> >>>>> Benoit >>>>> >>>>> 2009/6/19 Benoit Jacob <jacob.benoit.1@xxxxxxxxx> >>>>> >>>>> >>>>>> >>>>>> 2009/6/19 Gael Guennebaud <gael.guennebaud@xxxxxxxxx> >>>>>> >>>>>> >>>>>>> >>>>>>> On Fri, Jun 19, 2009 at 12:29 PM, Patrick Mihelich >>>>>>> <patrick.mihelich@xxxxxxxxx> wrote: >>>>>>> >>>>>>> >>>>>>>> >>>>>>>> On Fri, Jun 19, 2009 at 12:37 AM, Moritz Lenz >>>>>>>> <mlenz@xxxxxxxxxxxxxxxxxxxxxxx> wrote: >>>>>>>> >>>>>>>> >>>>>>>>> >>>>>>>>> Considering the number of times people make this error (forgetting to >>>>>>>>> include it), what about including it by default? Is there a very good reason >>>>>>>>> not to do it? >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>>> I wonder this too. I ran into this error when I started using Eigen, >>>>>>>> and it seems to pop up regularly on the list. What exactly is the cost of >>>>>>>> including <Eigen/Array> in the core? How much does it increase compile >>>>>>>> times? >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> on my high end computer with gcc 4.3.2 -O2 -DNDEBUG, much less time >>>>>>> than to compile: Vector3f a, b; cout << a+b;, so something around 0..02 >>>>>>> sec. >>>>>>> >>>>>>> >>>>>> >>>>>> On my computer I tried this program: >>>>>> >>>>>> #include <Eigen/Core> >>>>>> //#include <Eigen/Array> >>>>>> >>>>>> using namespace Eigen; >>>>>> >>>>>> int main() { >>>>>> Matrix3d m = Matrix3d::Identity(); >>>>>> Matrix3d n = m+m; >>>>>> Vector3d v; v << 1, 2, 3; >>>>>> Vector3d w = v+v; >>>>>> w = m * w; >>>>>> std::cout << w << std::endl; >>>>>> } >>>>>> >>>>>> with g++ 4.3.3. I repeated the compilation 10 times. >>>>>> >>>>>> The #include<Eigen/Array> increases compilation times by 2.5% and the >>>>>> memory usage is not affected. >>>>>> >>>>>> I'm OK to consider this reasonable, especially as other modules like >>>>>> Geometry already include Array. >>>>>> What's your opinion? >>>>>> >>>>>> The next question would be: should we merge the Array/ files into >>>>>> Core/ or just #include<Array> in Core. >>>>>> >>>>>> Benoit >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> >>>> >>> >>> -- >>> Rohit Garg >>> >>> http://rpg-314.blogspot.com/ >>> >>> Senior Undergraduate >>> Department of Physics >>> Indian Institute of Technology >>> Bombay >>> >>> >>> >> >> >> > > >

**References**:**[eigen] eigen sqrt compilation error***From:*Rohit Garg

**Re: [eigen] eigen sqrt compilation error***From:*Moritz Lenz

**Re: [eigen] eigen sqrt compilation error***From:*Patrick Mihelich

**Re: [eigen] eigen sqrt compilation error***From:*Gael Guennebaud

**Re: [eigen] eigen sqrt compilation error***From:*Benoit Jacob

**Re: [eigen] eigen sqrt compilation error***From:*Benoit Jacob

**Re: [eigen] eigen sqrt compilation error***From:*Mark Borgerding

**Re: [eigen] eigen sqrt compilation error***From:*Rohit Garg

**Re: [eigen] eigen sqrt compilation error***From:*Benoit Jacob

**Re: [eigen] eigen sqrt compilation error***From:*Mark Borgerding

**Messages sorted by:**[ date | thread ]- Prev by Date:
**Re: [eigen] eigen sqrt compilation error** - Next by Date:
**Re: [eigen] eigen sqrt compilation error** - Previous by thread:
**Re: [eigen] eigen sqrt compilation error** - Next by thread:
**Re: [eigen] eigen sqrt compilation error**

Mail converted by MHonArc 2.6.19+ | http://listengine.tuxfamily.org/ |