$ make && time /tmp/src/pin-2.14-71313-gcc.4.4.7-linux/pin -t ~/follow_io/follow_io.so -- ./experiments/csv/name/print_csv_col ./experiments/csv/records.csv name | less
$ cat out.ldj | ./byte_usage.js
$ mv out.ldj usage.json used_bytes.txt read_bytes.txt experiments/csv/name