Shellscript to run a cmd n-times and write time-output to txt file

Benchmark.sh

#!/bin/bash

if [ -z "${TIMES}" ]; 
        then 
             	echo "TIMES is unset, use export TIMES=10";
                TIMES=10 
        else 
             	echo "TIMES is set to $TIMES";
fi

if [ -z "$@" ]; 
	then 
             	echo "Run this script with a cmd!";
                exit 1
fi

CURRENT_TIME=$(date +%s)

echo "Start Benchmark"

for i in $(seq 1 $TIMES); do
  { time "$@";} 2>> benchmark_"$CURRENT_TIME".txt;
done

echo "Benchmark File: benchmark_$CURRENT_TIME.txt"