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Bug 211

Summary:	Remove heap allocations on HouseholderSequence::evalTo()
Product:	Eigen	Reporter:	Adolfo Rodriguez Tsouroukdissian <adolfo.rodriguez>
Component:	Householder	Assignee:	Nobody <eigen.nobody>
Status:	RESOLVED FIXED
Severity:	enhancement	CC:	gael.guennebaud, jacob.benoit.1
Priority:	---
Version:	3.0
Hardware:	All
OS:	All
Whiteboard:
Bug Depends on:
Bug Blocks:	387

Description Adolfo Rodriguez Tsouroukdissian 2011-03-02 18:33:36 UTC

The evalTo(DestType& dst) method of HouseholderSequence uses a temporary matrix in its implementation. This precludes using it in scenarios involving dynamic matrices and no-malloc restrictions. In such scenarios it is customary to preallocate resources in advance. Is there any way, or is it possible at all to prevent this allocation?, to pass the preallocated temporary?, ...

Comment 1 Benoit Jacob 2011-03-07 00:55:12 UTC

The most probable fix is to add an option to pass to evalTo a preallocated 'workspace' matrix.

Comment 2 Adolfo Rodriguez Tsouroukdissian 2012-03-26 18:27:20 UTC

I believe a patch for this one was applied in Part 2 of #206.

Comment 3 Gael Guennebaud 2012-03-27 00:02:23 UTC

great

Comment 4 Nobody 2019-12-04 10:26:45 UTC

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