Speed test using shell

#!/bin/bash
## Speedtest script
## Copyright (C) 2012 Jishnu Mohan <jishnu7@gmail.com>
## Last revised 28-Nov-2012
##
## Usage: speedtest <input file> <output file>
##
## This script takes list of URLs from input text file and outputs
## speed and time it took to access each file/URL

if [ $1 ]
then
FILENAME=$1
else
echo "Usage: speedtest <input file> <output file>"
    exit 0
fi

if [ $2 ]
then
OUTPUT=$2
else
OUTPUT="output"
fi

rm -f $OUTPUT
echo -e "URL\tSize(bytes)\tSpeed(bytes/s)\tTime(s)" >> $OUTPUT

counter=0

findspeed () {
    local url=$1
    curl -w $url'\t%{size_download}\t%{speed_download}\t%{time_total}\n' -o /dev/null -s $url >> $OUTPUT
    counter=`expr $counter + 1`
    echo -ne "Number of URLs tested: $counter\r"
    }

while read line
do
findspeed $line
done < "$FILENAME"

column -t "$OUTPUT"

You can get this code from my blog or github gist.