static File zipToByteComp(File zip) {
  ret zipToByteComp(zip, replaceExtension(zip, ".bc"));
}

static File zipToByteComp(File zip, File bc) {
  new LineCompCompressor comp;
  comp.verboseStats = true;
  comp.byteMode = true;
  comp.loadTexts(zipFileToStringMap(zip));
  comp.run();
  lcSaveToFile(comp, bc);
  print("Zip:      " + renderFileInfo(zip));
  print("ByteComp: " + renderFileInfo(bc));
  ret bc;
}

Began life as a copy of #1028789