Improve slightly the performances of otb::ImageFunctorFilter.
Rationale
otb::ImageFunctorFilter with a lambda is slightly less performant than itk::UnaryFunctorImageFilter with a dynamic functor.
Implementation Details
itk::UnaryFunctorImageFilter only updates the progress reporter once per line.
This MR mimics ITK behaviour.
Results
The performance improvement is small, less than 10% on simple filters like a scaling filter that multiplies pixel values. The gap seems to have been filled.
Copyright
The copyright owner is CNES and has signed the ORFEO ToolBox Contributor License Agreement.
Check before merging:
All discussions are resolved
At least 2 votes from core developers, no vote.
The feature branch is (reasonably) up-to-date with the base branch
Dashboard is green
Copyright owner has signed the ORFEO ToolBox Contributor License Agreement
