Introduce new data structure for accumulators:
1) Thread safe
2) Without memory allocation
3) EXTREMELY FAST

Old std::map:
26547 root       20   0  127M  7216  2832 S 68.0  0.0  8h11:37 │  └─ /opt/fastnetmon/fastnetmon
26551 root       20   0  127M  7216  2832 R 59.0  0.0  6h44:51 │     ├─ /opt/fastnetmon/fastnetmon
26550 root       20   0  127M  7216  2832 S  0.0  0.0  0:00.00 │     ├─ /opt/fastnetmon/fastnetmon
26549 root       20   0  127M  7216  2832 S  7.0  0.0  1h15:12 │     ├─ /opt/fastnetmon/fastnetmon
26548 root       20   0  127M  7216  2832 S  0.0  0.0 11:33.57 │     └─ /opt/fastnetmon/fastnetmon

New std::map:
29427 root       20   0  153M  5604  3436 S 22.0  0.0  0:09.60 │        └─ ./fastnetmon
29431 root       20   0  153M  5604  3436 R 21.0  0.0  0:09.06 │           ├─ ./fastnetmon
29430 root       20   0  153M  5604  3436 S  0.0  0.0  0:00.00 │           ├─ ./fastnetmon
29429 root       20   0  153M  5604  3436 S  0.0  0.0  0:00.22 │           ├─ ./fastnetmon
29428 root       20   0  153M  5604  3436 S  1.0  0.0  0:00.31 │           └─ ./fastnetmon