static File lcCompressFilePart_upper(File file, long startIndex, int length, O... _) {
  optPar bool balancing = true;
  optPar bool verbose;

  print("Compressing " + file);
  time "Compressed" {
    new LineCompCompressor compressor;
    compressor.byteMode = true;
    compressor.toUpper = true;
    print("byte mode");
    print("toUpper mode");
    compressor.verboseCompressionSteps = print(+verbose);
    compressor.balancing = true;
    if (compressor.balancing) print("balancing mode");
    compressor.verify = false;
    compressor.verboseStats = true;
    compressor.loadTexts(litmap(str(startIndex), loadTextFilePart_rawBytes(file, startIndex, startIndex+length));
    compressor.run();
    File archiveFile = appendToFileName(file, ".ubc");
    lcSaveToFile(compressor, archiveFile);
    ret printFileInfo(archiveFile);
  }
}