Reduce processing time for large GeoTIFF image

Question

I am trying to process large GeoTIFF images (128 MB) using GeoTIFF reader provided by Geotools library. However the processing time is very high, can anyone suggest how to reduce this time. Normal processing time for this image is 210000 ms, whereas my target is 500 ms.

GdalInfo of the image:

Driver: GTiff/GeoTIFF  
Files: /Users/RGBI-7cm.tif  
Size is 4000, 4000. 
Coordinate System is `'  
Metadata:  
  TIFFTAG_RESOLUTIONUNIT=1 (unitless)  
  TIFFTAG_XRESOLUTION=1  
  TIFFTAG_YRESOLUTION=1  
Image Structure Metadata:  
  INTERLEAVE=PIXEL  
Corner Coordinates:
Upper Left  (    0.0,    0.0)
Lower Left  (    0.0, 4000.0)
Upper Right ( 4000.0,    0.0)
Lower Right ( 4000.0, 4000.0)
Center      ( 2000.0, 2000.0)
Band 1 Block=4000x1 Type=UInt16, ColorInterp=Red
  Mask Flags: PER_DATASET ALPHA
Band 2 Block=4000x1 Type=UInt16, ColorInterp=Green
  Mask Flags: PER_DATASET ALPHA
Band 3 Block=4000x1 Type=UInt16, ColorInterp=Blue
  Mask Flags: PER_DATASET ALPHA
Band 4 Block=4000x1 Type=UInt16, ColorInterp=Alpha

Code for processing the image in Java:

S3Object s3Object = awsFetchService.fetchObject(cropImageRequest.getAwsS3Bucket(),cropImageRequest.getPrimaryFilePath());
GeoTiffReader reader = new GeoTiffReader(s3Object.getObjectContent());
GridCoverage2D gridCoverage = reader.read(null);

Answer 1

Pulling an uncompressed and untiled geotiff (even a small one like 128Mb) is going to be slow.

You should process the GeoTiff using the advice in GeoServer on Steroids (video) or Paul Ramsey's GeoTiff Compression for Dummies. This will probably make your tiff small enough that the network transport cost doesn't overwhelm your reading time.