Collectl

 collectl -sn -oT -i0.5
https://linux.die.net/man/1/collectl

collectl -sn -oT -i1
waiting for 1 second sample...
#         <----------Network---------->
#Time       KBIn  PktIn  KBOut  PktOut
15:13:07     776  10803 120890   81762
15:13:08     773  10733 120329   81423
15:13:09     870  11888 120369   81478
15:13:10     516   7171  79575   53861
15:13:11       0      1      0       1
15:13:12       0      3      0       1
15:13:13       0      1      0       1
15:13:14       0      0      0       0
15:13:15       0      5      0       2
15:13:16       0      2      0       1
15:13:17       0      4      0       1
15:13:18       0      2      0       1
15:13:19       0      3      0       1
15:13:20       0      3      0       1
15:13:21     533   7007  63333   42924
15:13:22     772  10746 120321   81431
15:13:23     775  10782 120627   81604
15:13:24     853  11580 118678   80375
15:13:25     745  10353 115202   77950
15:13:26       0      1      0       2
15:13:27       0      3      0       1
15:13:28       1      2      0       1
#         <----------Network---------->

See also

• Network performance: iperf, nload, iftop, iptraf-ng, nethogs, bmon, slurm, collectl, collectd, speedometer, VnStat, Darkstat, Monitorix, mrtg, mrt, traceroute, munin, smokeping, sar -n, ping, fping, nping, Jitter, fast.com