Network namespace timing

unshare.sh

#!/usr/bin/env bash
TIMEFORMAT="%R"
sumt1=0
sumt2=0
for ((i=1; i<=10; i++)); do
    echo -ne $i\\r
    sumt1=$(bc <<< "$sumt1 + $(time (unshare -n true) 2>&1)")
    sumt2=$(bc <<< "$sumt2 + $(time (unshare -n true) 2>&1)")
    sleep $(bc <<< "scale=3; ($sumt1 + $sumt2) / $i * 2")
done
echo sumt1 = $sumt1, sumt2 = $sumt2