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  • #1201

Closed
Open
Opened Dec 04, 2019 by Eigen Bugzilla@eigenbzMaintainer

Very slow Affine3f to Vector3f multiplication

Submitted by Nikolai

Assigned to Nobody

Link to original bugzilla bug (#1201)
Version: 3.3 (current stable)

Description

Eigen::Affine3f m;
1)
Eigen::Vector3f v(p[0], p[1], p[2]);
Eigen::Vector3f res = m*v;

  1.          Eigen::Vector4f v(p[0], p[1], p[2], 1);  
             Eigen::Vector4f res = m.matrix()*v;  

First example 4x times slower than the second! Compiled in Visual Studio 2015 upd 2 with full optimization.

Blocking

#558

Edited Dec 05, 2019 by Eigen Bugzilla
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3.3
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3.3
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Reference: libeigen/eigen#1201