Streaming data to the browser from FileStorageIRODS seems to be reading one byte at a time. A 1.6 kb file can take about 1 minute to download from the service. Somewhere in the service it must be calling stream.read() instead of stream.read(buf[]). This inefficiency would probably show up for FileStorageMedici since the the data would be streamed from Medici as opposed to FileStorageDisk which is located on disk.