[gdal-dev] BandReadAsArray speed up
hobu.inc at gmail.com
Mon Feb 23 19:54:39 EST 2009
On Feb 23, 2009, at 5:32 PM, Gong, Shawn (Contractor) wrote:
> hi list,
> I am reading the image data for a bandobj, using BandReadAsArray()
> which works, but it is sometimes slow.
> Is it actually reading from the file? Is there a way to access the
> image data that is already in memory, or anything else I could do to
> speed it up?
BandReadAsArray has regressed a bit from old-gen bindings to new-gen
bindings. Specifically, it is reallocating every time a read happens
instead of allowing you to fill an already existing array. This might
give you a significant speedup depending on your circumstances. I
hope to fix this bug at the Toronto sprint.
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