double sec = (System.currentTimeMillis() - start) / 1000d;
String size = Formats.forNumber().format(file.length(), "0.#", "B");
String speed = sec <= 0 ? "N/A" : Formats.forNumber().format(file.length() / sec, "0.0", "B/s");
t.addData("size", size);
t.addData("speed", speed);
t.setStatus(Message.SUCCESS);
if (!file.delete()) {
m_logger.warn("Can't delete file: " + file);