cargo install procrec

$ git clone https://github.com/gh0st42/procrec
$ cargo install --path .

$ procrec -h
procrec 0.2.2
Lars Baumgaertner
Process recorder to log cpu utilization and memory consumption
USAGE:
    procrec [FLAGS] [OPTIONS] --pid <pid>
FLAGS:
    -g, --graph            Display graph using gnuplot
    -h, --help             Prints help information
    -t, --print-gnuplot    Just print gnuplot script
    -v, --verbose          A level of verbosity, and can be used multiple times
    -V, --version          Prints version information
OPTIONS:
    -d, --duration <duration>    Duration for observation
    -i, --interval <interval>    Sampling interval in seconds [default: 2]
    -p, --pid <pid>              Process to be inspected

$ pgrep iTerm
4730
4742
4748
4769
4772
$ procrec -p 4730 -g -i 1 -v
0.00 PID 1119 CPU% 4.32 RSS 549793 VSIZE 10123419
1.00 PID 1119 CPU% 7.84 RSS 549863 VSIZE 10123137
2.01 PID 1119 CPU% 2.96 RSS 549830 VSIZE 10119688
3.01 PID 1119 CPU% 2.47 RSS 547377 VSIZE 10087645
4.01 PID 1119 CPU% 3.65 RSS 547340 VSIZE 10091315
5.01 PID 1119 CPU% 3.31 RSS 547340 VSIZE 10091315
6.01 PID 1119 CPU% 2.63 RSS 547377 VSIZE 10087645
7.01 PID 1119 CPU% 3.87 RSS 539983 VSIZE 10074480
8.01 PID 1119 CPU% 3.34 RSS 539992 VSIZE 10074480
9.02 PID 1119 CPU% 2.68 RSS 540028 VSIZE 10070810
10.02 PID 1119 CPU% 3.75 RSS 539992 VSIZE 10074480
11.02 PID 1119 CPU% 3.43 RSS 539451 VSIZE 10073919
^C12.03 PID 1119 CPU% 8.01 RSS 272269 VSIZE 9775452