+ if Time.now - last_info_time > PROGRESS_UPDATE_INTERVAL
+ last_info_time = Time.now
+ elapsed = last_info_time - start_time
+ start = opts[:start_at] || source.start_offset
+ pctdone = 100.0 * (source.cur_offset - start).to_f / (source.end_offset - start).to_f
+ remaining = (100.0 - pctdone) * (elapsed.to_f / pctdone)
+ $stderr.printf "## read %dm (about %.0f%%) @ %.1fm/s. %s elapsed, about %s remaining\n", num_scanned, pctdone, num_scanned / elapsed, elapsed.to_time_s, remaining.to_time_s
+ end
+