#!/usr/bin/awk -f
# vim: ft=awk ts=4 sw=4 et
NF == 4 {
        count_same += $1;
        count_changed += $2;
        total_before += $3;
        total_after += $4;
    }
END {
        count = count_same + count_changed;
        percent_same =    (100 * count_same) / count;
        percent_changed = (100 * count_changed) / count;
        printf "calls with no change: %8d (%5.2f%%)\n",
            count_same, percent_same;
        printf "calls with changes:   %8d (%5.2f%%)\n",
            count_changed, percent_changed;

        printf "\n";
        printf "calls with changes:\n";
        printf "number of vars before: %8d\n", total_before;
        printf "number of vars after:  %8d\n", total_after;
        printf "percentage left after:   %5.2f%%\n",
            ((100 * total_after) / total_before);
        printf "percentage deleted:      %5.2f%%\n",
            ((100 * (total_before - total_after)) / total_before);
    }