scripts/bloatcheck

#!/bin/bash

if [ $# -ne 2 ]
then
  echo "usage: bloatcheck old new"
  exit 1
fi

addline()
{
  NEXT="$(printf "%s% $((50-${#LASTNAME}))d% 10d %10d" "$LASTNAME" "$OLD" "$NEW" "$DELTA")"
  [ -z "$STUFF" ] &&
    STUFF="$NEXT" ||
    STUFF="$(printf "%s\n%s" "$STUFF" "$NEXT")"
}

diff <(nm --size-sort "$1" | sort -k3,3) \
     <(nm --size-sort "$2" | sort -k3,3) | grep '^[<>]' | sort -k4,4 | \
(
LASTNAME=
DELTA=0
TOTAL=0
OLD=0
NEW=0
STUFF=

printf "name% 46s% 10s% 11s\n" old new delta
echo "-----------------------------------------------------------------------"
while read a b c d
do
  THISNAME=$(echo " $d" | sed 's/[.][0-9]*$//')

  if [ "$LASTNAME" != "$THISNAME" ]
  then
    TOTAL=$(($TOTAL+$DELTA))
    [ $DELTA -ne 0 ] && addline
    LASTNAME="$THISNAME"
    DELTA=0
    OLD=0
    NEW=0
  fi

  SIZE=$(printf "%d" "0x$b")
  if [ "$a" == "<" ]
  then
    OLD=$(($OLD+$SIZE))
    SIZE=$((-1*$SIZE))
  else
    NEW=$(($NEW+$SIZE))
  fi
  DELTA=$(($DELTA+$SIZE))
done

TOTAL=$(($TOTAL+$DELTA))
[ $DELTA -ne 0 ] && addline

echo "$STUFF" | sort -k4,4nr
echo "-----------------------------------------------------------------------"
printf "% 71d total\n" "$TOTAL"
)