perl -e 'print time'

stamp(){
  perl -e 'print time'
}

exec >> "$LOGFILE" 2>&1

LOGFILE=completed_work_$(date +%F).log
stamp(){
  perl -e 'print time'
}
exec >> "$LOGFILE" 2>&1
my_run_start_date=$(date +%F)
my_run_start_time=$(date +%H:%M)

echo "Run began on $my_run_start_date at $my_run_start_time"
master_start=$(stamp)
# do the work here

step_start=$(stamp) #timer start
echo 1 Do some work here.;echo 1 This is what we did here.
step_end=$(stamp)   #timer end
step_diff=$((step_end - step_start))
echo How long it took to do it : $step_start - $step_end = $step_diff

# we can do this as many times as we need to
step_start=$(stamp) #timer start
echo 2 Do some work here.;echo 2 This is what we did here.
step_end=$(stamp)   #timer end
step_diff=$((step_end - step_start))
echo How long it took to do it : $step_start - $step_end = $step_diff

# end of the work section
master_end=$(stamp)
master_diff=$((master_end - master_start))
my_run_end_date=`date +%F`
my_run_end_time=`date +%H:%M`
echo "Run ended on $my_run_end_date at $my_run_end_time"
echo "Start=$master_start : End=$master_end"
master_time_elapsed=$((master_diff / 3600))
echo "Elapsed time = $master_time_elapsed hours"

stamp(){
  perl -e 'print time'
}

timer(){
  case $1 in
    start) TS=$(stamp) ;;
    stop)  echo "How long it took to do it : $(( $(stamp) - TS )) seconds" ;;
  esac
}

LOGFILE=completed_work_$(date +%F).log

exec >> "$LOGFILE" 2>&1

echo "Run began on $(date '+%F at %H:%M')"
master_start=$(stamp)
# do the work here

timer start
echo "1 Do some work here." ;echo "1 This is what we did here."
timer stop

# we can do this as many times as we need to
timer start
echo "2 Do some work here.";echo "2 This is what we did here."
timer stop

# end of the work section
master_end=$(stamp)
master_diff=$((master_end - master_start))
master_time_elapsed=$((master_diff / 3600))
echo "Run ended on $(date '+%F at %H:%M')"
echo "Start=$master_start : End=$master_end"
echo "Elapsed time = $master_time_elapsed hours"