$ time ./a.out
2016-10-26 2:17:09	 0 s	 Chunk size: 79148544 (= 1207 MB)
2016-10-26 2:17:09	 0 s	 Init done. Time: 0.000s
2016-10-26 2:17:09	 0 s	 Open input: data.txt
2016-10-26 2:17:09	 0 s	 Opening done. Time: 0.000s
2016-10-26 2:17:09	 0 s	 Allocating buffers done. Time: 0.000s
2016-10-26 2:17:09	 0 s	 Read chunk 0.
2016-10-26 2:17:21	 12 s	 Reading & parsing chunk done. Time: 11.770s
2016-10-26 2:17:21	 12 s	 Running RadixSort.
2016-10-26 2:17:21	 12 s	 Sorting with shift: 0
2016-10-26 2:17:26	 17 s	 Sorting with shift: 16
2016-10-26 2:18:00	 51 s	 Sorting with shift: 32
2016-10-26 2:18:03	 54 s	 Sorting with shift: 48
2016-10-26 2:18:05	 56 s	 Sort done. Time: 43.630s
2016-10-26 2:18:05	 56 s	 Save chunk: ./chunk0000_000000000.bin
2016-10-26 2:18:05	 56 s	 Opening binary file done. Time: 0.075s
2016-10-26 2:18:22	 73 s	 Writing to binary file done. Time: 17.285s
2016-10-26 2:18:22	 73 s	 Sorting & saving chunk done. Time: 61.087s
2016-10-26 2:18:22	 73 s	 Read chunk 1.
2016-10-26 2:18:46	 97 s	 Reading & parsing chunk done. Time: 23.689s
2016-10-26 2:18:46	 97 s	 Running RadixSort.
2016-10-26 2:18:46	 97 s	 Sorting with shift: 0
2016-10-26 2:18:50	 101 s	 Sorting with shift: 16
2016-10-26 2:18:53	 104 s	 Sorting with shift: 32
2016-10-26 2:18:55	 106 s	 Sorting with shift: 48
2016-10-26 2:18:57	 108 s	 Sort done. Time: 11.643s
2016-10-26 2:18:57	 108 s	 Save chunk: ./chunk0000_000000001.bin
2016-10-26 2:18:57	 108 s	 Opening binary file done. Time: 0.019s
2016-10-26 2:19:12	 123 s	 Writing to binary file done. Time: 14.456s
2016-10-26 2:19:12	 123 s	 Sorting & saving chunk done. Time: 26.119s
2016-10-26 2:19:12	 123 s	 Read chunk 2.
2016-10-26 2:19:13	 124 s	 Reading & parsing chunk done. Time: 1.297s
2016-10-26 2:19:13	 124 s	 Running RadixSort.
2016-10-26 2:19:13	 124 s	 Sorting with shift: 0
2016-10-26 2:19:13	 124 s	 Sorting with shift: 16
2016-10-26 2:19:13	 124 s	 Sorting with shift: 32
2016-10-26 2:19:13	 124 s	 Sorting with shift: 48
2016-10-26 2:19:13	 124 s	 Sort done. Time: 0.098s
2016-10-26 2:19:13	 124 s	 Save chunk: ./chunk0000_000000002.bin
2016-10-26 2:19:13	 124 s	 Opening binary file done. Time: 0.000s
2016-10-26 2:19:13	 124 s	 Writing to binary file done. Time: 0.019s
2016-10-26 2:19:13	 124 s	 Sorting & saving chunk done. Time: 0.118s
2016-10-26 2:19:13	 124 s	 Close and delete input.
2016-10-26 2:19:14	 125 s	 Deallocating done. Time: 0.642s
2016-10-26 2:19:14	 125 s	 Initialize 8-way merge.
2016-10-26 2:19:14	 125 s	 Merge chunks 0 to 2 (pass 0)
2016-10-26 2:19:14	 125 s	 Open chunk 0: ./chunk0000_000000000.bin
2016-10-26 2:19:14	 125 s	 Chunk 0 contains: 140710163316736
2016-10-26 2:19:14	 125 s	 Open chunk binary done. Time: 0.000s
2016-10-26 2:19:14	 125 s	 Open chunk 1: ./chunk0000_000000001.bin
2016-10-26 2:19:14	 125 s	 Chunk 1 contains: 140708896935936
2016-10-26 2:19:14	 125 s	 Open chunk binary done. Time: 0.000s
2016-10-26 2:19:14	 125 s	 Open chunk 2: ./chunk0000_000000002.bin
2016-10-26 2:19:14	 125 s	 Chunk 2 contains: 140708879548416
2016-10-26 2:19:14	 125 s	 Open chunk binary done. Time: 0.000s
2016-10-26 2:19:14	 125 s	 Save output chunk: data.out
2016-10-26 2:19:15	 126 s	 Buffer size is: 4 kB
2016-10-26 2:19:15	 126 s	 Open output file. Time: 0.693s
2016-10-26 2:21:01	 232 s	 Chunk 2 exhausted.
2016-10-26 2:21:01	 232 s	 Chunk 2 exhausted.
2016-10-26 2:21:01	 232 s	 Chunk 2 exhausted.
2016-10-26 2:21:01	 232 s	 Main merge done. Find Min: 3.358s, Move Ahead: 67.900s, Write: 5.850s, Serialize: 11.128s, Buffere Write: 4.745s
2016-10-26 2:21:01	 232 s	 The same values normalized per items. Find Min: 0.000s, Move Ahead: 0.000s, Write: 0.000s, Serialize: 0.000s, Buffere Write: 0.000s
2016-10-26 2:21:01	 232 s	 Truncate done. Time: 0.026s
2016-10-26 2:21:01	 232 s	 Dealloc & close done. Time: 0.031s
2016-10-26 2:21:01	 232 s	 Delete chunk: ./chunk0000_000000000.bin
2016-10-26 2:21:01	 232 s	 Delete chunk: ./chunk0000_000000001.bin
2016-10-26 2:21:01	 232 s	 Delete chunk: ./chunk0000_000000002.bin
2016-10-26 2:21:01	 232 s	 Delete chunks done. Time: 0.231s
2016-10-26 2:21:01	 232 s	 Merge done. Time: 106.805s
2016-10-26 2:21:01	 232 s	 Done. May the Force be with you!

real	3m51.587s
user	1m10.816s
sys	0m9.707s