#!/bin/sh

start_secs=$(date +%s)
n=0
peak_sec_count=0
while read m d t host line; do
    log_sec=$(date -d "$m $d $t" +%s)
    if [ $n = 0 ]; then
        start_sec=$log_sec
        this_sec=$log_sec
    fi
    if [ $this_sec = $log_sec ]; then
        this_sec_count=$((this_sec_count+1))
    else
        this_sec_count=0
    fi
    if [ $this_sec_count -gt $peak_sec_count ]; then
        peak_sec_count=$this_sec_count
    fi
    elaps_sec=$((log_sec-start_sec))
    if [ $elaps_sec -gt 0 ]; then
        avg=$(($n/(log_sec-start_sec)))
    fi
    this_sec=$log_sec
    n=$((n+1))
    #echo $log_sec $avg $this_sec_count $line
done
spent_secs=$(($(date +%s)-start_secs))
echo "$n log entries over an elapsed time period of $elaps_sec seconds with a peak of $peak_sec_count records per second and an overall average of $avg records per second"
echo "processed $n log entries in $spent_secs seconds at a rate of $((n/spent_secs)) records per second"