[gdal-dev] OGR random read optimization?
rayg at daylongraphics.com
Mon Nov 30 22:06:07 EST 2009
The OGRLayer::SetNextByIndex() function can be sped up by keeping track
of the previously used index, and calling ResetReading() only if the new
index is lesser than it. Otherwise, read forward and skip features by
the difference of the new and old indices.
For thread safety, the old index should be kept in a caller-level data
structure which is passed in as an argument to SetNextByIndex.
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