View executed time of bash script in nanoseconds

Question

Currently, the time $0 command within my bash script shows the following similar output

time $0

real    0m0.000s
user    0m0.000s
sys     0m0.000s

but ideally, I would like to see the execution time of the script in nanoseconds. How would this be done? Thanks

score 1 · Answer 1 · answered Jan 21 '20 at 11:20

1

I'm afraid that you won't get reliable measurements with this precision.

answered Jan 21 '20 at 11:20

Tomasz Rochumski

score 0 · Answer 2 · answered Jan 21 '20 at 11:13

0

This solution worked

start_time="$(date -u +%N)"
end_time="$(date -u +%N)"
nanotime="$(bc <<<"$end_time-$start_time")"
echo "$nanotime"

answered Jan 21 '20 at 11:13

DarkEvE

2 Answers2