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@x2q
Created Sep 9, 2013
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#! /bin/bash
NBLOOP=3
COMPRESS_OBJECT=db/
memstats()
{
(
renice 19 $$ >/dev/null 2>&1
while : ; do
ps --no-headers -o rss -C $1 || break
sleep 1
done | tail -n 1
)
}
bench()
{
for i in $(seq 1 $NBLOOP) ; do
trap "rm -f out.$2" EXIT
/usr/bin/time -f "DONE: comp $1-$3 ($i) time: %e" tar cf out.$2 $COMPRESS_OBJECT --$1 2>&1 >/dev/null & sleep 1
mem=$(memstats $1)
size=$(stat -c '%s' out.$2)
echo "... mem: $mem size: $size"
echo
mkdir tmp_extract_$$ || exit 1
trap "rm -f out.$2 ; rm -Rf tmp_extract_$$" EXIT
/usr/bin/time -f "DONE: decomp $1-$3 ($i) time: %e" tar xf out.$2 -C tmp_extract_$$ 2>&1 >/dev/null & sleep 1
mem=$(memstats $1)
echo "... mem: $mem"
echo
rm -f out.$2
rm -Rf tmp_extract_$$
trap - EXIT
done
}
#for level in none ; do
# echo "=== COMPRESS ==="
# bench compress Z
#done
for level in 1 3 7 8 9 ; do
echo "=== LZOP -$level ==="
export LZOP="-$level"
bench lzop lzo $level
done
for level in 1 2 3 4 5 6 7 8 9 ; do
echo "=== GZIP -$level ==="
export GZIP="-$level"
bench gzip gz $level
done
for level in 1 2 3 4 5 6 7 8 9 ; do
echo "=== BZIP2 -$level ==="
export BZIP2="-$level"
bench bzip2 bz2 $level
done
for level in 0 1 2 3 4 5 6 7 8 9 ; do
echo "=== LZMA -$level ==="
export XZ_OPT="-$level"
bench lzma lzma $level
done
for level in 0 1 2 3 4 5 6 7 8 9 ; do
echo "=== XZ (LZMA2) -$level ==="
export XZ_OPT="-$level"
bench xz xz $level
done
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