benchmark.sh

#!/bin/bash
set -euo pipefail

measure() {
  f=$1
  n=$2
  shift 2
  echo wall,user,sys,rss > "$f"
  for i in $(seq $n); do
    [[ -d $i ]] && rm -rf $i
    mkdir $i
    echo \$ "$@"
    ( cd $i; /usr/bin/time --output "../$f" --append --format '%e,%U,%S,%M' "$@" )
    rm -rf "./$i"
  done
}

echo "Running 3 iterations"
measure "timing" 3 "$@"

echo "Average time over 3 iterations"
awk '{ total += $1; count++ } END { print total/count }' <(tail -n+2 timing)
rm timing