Benchmarking programs in Linux SHELL

avg_time.sh

#!/bin/bash

avg_time() {
	# usage: avg_time n command ...
	#
	n=$1; shift
	(($# > 0)) || return
	for((i = 0; i < n; i++)); do
		{ time -p "$@" &>/dev/null; } 2>&1
	
	done | awk '
		/real/ {real = real + $2; nr++ }
		/user/ {user = user + $2; nu++ }
		/sys/  {sys = sys + $2; ns++ }
		END	{
			if (nr>0) printf("real %f\n", real/nr);
			if (nu>0) printf("user %f\n", user/nu);
			if (ns>0) printf("sys %f\n", sys/ns);
			}
		'
}
avg_time 10 time /home/max/NVIDIA_CUDA-9.1_Samples/0_Simple/vectorAdd/vectorAdd