find and speedup SQLite 3.x databases

#!/bin/bash
find ~ -size +1k -type f -print0 | \
while read -d '' F; do
  A=$(readlink -f "$F")
  file -b "$A" | egrep -qe '^SQLite 3' || continue
  size_before=$(stat -c %s "$A")
  sqlite3 "$A" "VACUUM; REINDEX;" > /dev/null 2>&1
  size_after=$(stat -c %s "$A")
  echo -n "$F: ${size_before} -> ${size_after}, "
  echo "scale=2; (${size_after}/${size_before})*100" | bc -l
done
sleep 1
exit 0