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try using get1DJavaArray() instead of copyTo1DJavaArray(). This will avoid the copy if its already a float and in order, which should be the common case for grib. Jeff McWhirter wrote:
I have traced some code reading in a big 3D grid. The first column below shows elapsed time since last call, second column shows memory delta snce last call. The >...< are nested code blocks, showing the elapsed time. This chunk of code takes 5.2 seconds. Note, 1.5 seconds is just in the toFloatArray code, converting theArrayFloat.D3 to a 1D float array.Can we optimize this so the initial Array is of a form that eliminates this conversion? Perhaps we could pass in preference that tells the geogrid that the client will be askingfor 1D float data? -Jeff 105 68 >GeoGridAdapter.getFlatField:Relative_humidity:time=2 1 2 >GeoGridAdapter.getSpatialDomainSet 0 2 GeoGridAdapter isTimeDependent = false 1 1 <GeoGridAdapter.getSpatialDomainSet ms: 1 1 1 >GeoGridAdapter.geogrid.readVolumeData 3710 18834 <GeoGridAdapter.geogrid.readVolumeData ms: 3710 0 2 >toFloatArray array:ucar.ma2.ArrayFloat$D3 0 1 >Array.copyTo1DJavaArray copy 1 1 >Array.copyTo1DJavaArray factory 1066 376 <Array.copyTo1DJavaArray factory ms: 1066 1 1 >MAMAth.copy 3 1 >MAMath.iterate 441 2 <MAMath.iterate ms: 440 cnt=6569800 1 1 <MAMAth.copy ms: 445 0 1 <Array.copyTo1DJavaArray copy ms: 1512 0 2 >Array.copyTo1DJavaArray getStorage 0 1 <Array.copyTo1DJavaArray getStorage ms: 0 1 2 <toFloatArray ms: 1514 length:6569800 0 11 <GeoGridAdapter.getFlatField:Relative_humidity:time=2 ms: 5226===============================================================================To unsubscribe thredds-dev, visit: http://www.unidata.ucar.edu/mailing-list-delete-form.html===============================================================================