[gdal-dev] Slow performance observed while querying the shapefile

[kedardeshpande87]

Hi,

I have downloaded the latest shapefiles from US Census Bureau TIGER
Shapefiles containaing the ZipCode Tabulation Area (2010) information. I am
reading the shapefile to retrieve the zip code for a given point having
latitude/longitude. I open the shapefile to get the data source, get the
zipcode layer from that and the set a spatial filter on it.
But currently, I am getting very slow performance when doing this. It takes
on an average 200 milliseconds to find a zip code for a given point.
I had downloaded the ZCTA 2010 shapefile a few months ago and I was getting
the latency of around 1 to 2 milliseconds on an average. I recently
downloaded the same ZCTA 2010 shapefile from US Census Bureau web site and
now I am getting latency of 200 milliseconds. The code that reads the
shapefiles is the same.

Has anyone else observed similar behavior ?
What could be the cause of such a high latency ?

Thanks,
Kedar



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