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| ID | Project | Category | View Status | Date Submitted | Last Update | ||||
| 0002929 | VTK | (No Category) | public | 2006-03-02 05:20 | 2016-08-12 09:54 | ||||
| Reporter | Jens Henrik Goebbert | ||||||||
| Assigned To | Dave DeMarle | ||||||||
| Priority | low | Severity | feature | Reproducibility | always | ||||
| Status | closed | Resolution | moved | ||||||
| Platform | OS | OS Version | |||||||
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| Target Version | Fixed in Version | ||||||||
| Summary | 0002929: faster vtkCellLocator with buckets = sqrt(NumberOfCells) | ||||||||
| Description | I think that vtkCellLocator is faster if it sets the number of buckets to sqrt(NumberOfCells) instead of fixed 25. (the same is true for vtkPointLocator, too) | ||||||||
| Tags | No tags attached. | ||||||||
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(0003824) Mathieu Malaterre (developer) 2006-03-02 13:09 |
Do you have a way to test/reproduce ? |
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(0003828) Jens Henrik Goebbert (reporter) 2006-03-02 18:48 |
Suppose... (1)... it would take one step to check if a bucket contains the searched cell. (2)... it would take one step to check if a cell is the one we are searching for. In average we would have to check half the buckets to find the correct one and half the cells in that bucket to find the searched cell. We would need steps = buckets/2 + cells_per_bucket/2 with number_of_cells = buckets*cells_per_bucket => if "buckets" and "cells_per_bucket" would be the same size, "steps" would be minimum. Of course (1) and (2) do not take the same amount of calculation-time. So my thoughts may not be exact. But simply having 25 buckets seems to me worse. |
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(0030952) Jean-Christophe Fillion-Robin (manager) 2013-06-05 17:46 |
Could you check if the performance issue have been fixed in either VTK 5.10 or VTK 6 ? Ideally, providing a small program allowing to benchmark the proposed change would be helpful. In addition, if you would like, you could submit a patch using Gerrit. This would make the review and integration easier. For more details see http://www.vtk.org/Wiki/VTK/Git/Develop [^] |
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(0031220) Dave DeMarle (administrator) 2013-07-22 19:18 |
If the bug persists in 6.0.0, please reopen. |
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(0036838) Kitware Robot (administrator) 2016-08-12 09:54 |
Resolving issue as `moved`. This issue tracker is no longer used. Further discussion of this issue may take place in the current VTK Issues page linked in the banner at the top of this page. |
| Notes |
| Issue History | |||
| Date Modified | Username | Field | Change |
| 2008-11-30 09:13 | Mathieu Malaterre | Assigned To | Mathieu Malaterre => David Cole |
| 2011-01-19 09:57 | David Cole | Assigned To | David Cole => |
| 2011-06-16 13:11 | Zack Galbreath | Category | => (No Category) |
| 2013-06-05 17:46 | Jean-Christophe Fillion-Robin | Note Added: 0030952 | |
| 2013-07-22 19:18 | Dave DeMarle | Note Added: 0031220 | |
| 2013-07-22 19:18 | Dave DeMarle | Status | backlog => expired |
| 2013-07-22 19:18 | Dave DeMarle | Assigned To | => Dave DeMarle |
| 2016-08-12 09:54 | Kitware Robot | Note Added: 0036838 | |
| 2016-08-12 09:54 | Kitware Robot | Status | expired => closed |
| 2016-08-12 09:54 | Kitware Robot | Resolution | open => moved |
| Issue History |
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