Even wrote:
Hermann,
I'm not aware of any GDAL Trac ticket with the patch attached, some text
explaining why and when it is necessary/usefull, and ideally a step by step
scenario and sample data that demonstrates its usefulness. This is the general
procedure to submit enhancements & bug fixes, otherwise there's a high chance
the patch will be lost forever in the depths of mail boxes.
I filed a ticket at http://trac.osgeo.org/gdal/ticket/3120
I haven't repeated the whole story, but the bottom line is that in my case, the
performance improvement was around factor 20.
Hermann
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