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* Print out statistics comparing our performance to bzip2.

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This commit is contained in:
Eelco Dolstra 2004-11-29 21:04:28 +00:00
parent 13f77276d1
commit 71926ee188
1 changed files with 20 additions and 4 deletions
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24
patch/bdiff.sh
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@ -1,6 +1,7 @@
#! /bin/sh -e
DIFF=/home/eelco/Dev/nix/zdelta-2.1/zdc
#DIFF=/home/eelco/Dev/nix/zdelta-2.1/zdc
DIFF=/home/eelco/Dev/nix/bsdiff-4.2/bsdiff
srcA=$1
srcB=$2
@ -12,13 +13,28 @@ fi
(cd $srcB && find . -type f) | while read fn; do
echo "$fn" >&2
if test -f "$srcA/$fn"; then
echo "FILE DELTA FOR $fn"
$DIFF "$srcA/$fn" "$srcB/$fn"
TMPFILE=/tmp/__bsdiff
$DIFF "$srcA/$fn" "$srcB/$fn" $TMPFILE
cat $TMPFILE
diffSize=$(stat -c '%s' $TMPFILE)
# For comparison.
bzipSize=$(bzip2 < "$srcB/$fn" | wc -m)
gain=$(echo "scale=2; ($diffSize - $bzipSize) / $bzipSize * 100" | bc)
ouch=$(if test "${gain:0:1}" != "-"; then echo "!"; fi)
printf "%7.2f %1s %10d %10d %s\n" \
"$gain" "$ouch" "$diffSize" "$bzipSize" "$fn" >&2
# echo "$fn -> $diffSize $bzipSize ==> $gain $ouch" >&2
rm $TMPFILE
else