At4J 1.0 test report

Unit tests

64 bit Linux

OS:

Xubuntu 8.10 64 bit, Linux 2.6.27-11-generic SMP

File system:

xfs

Hardware:

Intel Core 2 Quad Q9550 @ 2.83GHz
8192 Mb RAM
Western Digital Raptor (3.5", 10,000 RPM, SATA)

32 bit Linux

OS:

SUSE Linux Enterprise Desktop 10, Linux 2.6.16.27-0.9-default

File system:

Ext3

Hardware:

Intel Pentium M 2.0 GHz stepping 08
2048 Mb RAM
Hitachi HTE726060M9AT00 (2.5", 7,200 RPM, ATA)

64 bit Solaris 10

OS:

Solaris 10 10/08

File system:

UFS

Hardware:

Intel Xeon E5420 @ 2.5GHz
8192 Mb RAM
RAID 10 array

64 bit Windows Vista

OS:

Windows Vista Business 64bit

File system:

NTFS

Hardware:

Intel Core 2 Duo T7500 @ 2.2GHz
4096 Mb RAM
Seagate ST9160823AS (2.5", 7,200 RPM, SATA)

32 bit Windows Vista

OS:

Windows Vista Enterprise

File system:

NTFS

Hardware:

Intel Core2 Duo U7600 @ 1.2GHz
2048 Mb RAM
Toshiba MK1011GAH (1.8", 4,200 RPM, ATA)

Performance tests

Performance tests were run as documented below on the files from the Linux kernel, version 2.6.28.3. Each test is run five times, and the average time is calculated. At4J's times are compared with the time it takes to complete the same operation using a command-line tool.

The tests were run on a quad-core machine running XUbuntu 8.10. A lot of other programs were running simultaneously, so the measurements given are by no means optimal times.

The following environment variables were set:

• $JAVA_HOME – pointed to a 64 bit JDK 1.6.0_12 installation.
• $CLASSPATH – a class path including all Jar files in the At4J distribution's lib directory.

gzip

gzip compress a Tar archive containing the source code for the Linux kernel. The uncompressed size of the archive is 310292480 bytes.

Command lines:

Using the gzip command:

$ time gzip linux-2.6.28.3.tar

Using the org.at4j.comp.gzip.prog.GZip class:

$ time $JAVA_HOME/bin/java -cp $CLASSPATH dr.org.at4j.comp.gzip.prog.GZip linux-2.6.28.3.tar

Uncompress a gzip compressed Tar archive containing the source code for the Linux kernel.

Command lines:

Using the gunzip command:

$ time gunzip linux-2.6.28.3.tar.gz

Using the org.at4j.comp.gzip.prog.GUnzip class:

$ time $JAVA_HOME/bin/java -cp $CLASSPATH dr.org.at4j.comp.gzip.prog.GUnzip linux-2.6.28.3.tar.gz

bzip2

bzip2 compress a Tar archive containing the source code for the Linux kernel. The uncompressed size of the archive is 310292480 bytes.

Command lines:

Using the bzip2 command:

$ time bzip2 linux-2.6.28.3.tar

Using the org.at4j.comp.bzip2.prog.BZip2 class:

$ time $JAVA_HOME/bin/java -cp $CLASSPATH dr.org.at4j.comp.bzip2.prog.BZip2 linux-2.6.28.3.tar

Uncompress a bzip2 compressed Tar archive containing the source code for the Linux kernel.

Command lines:

Using the bunzip2 command:

$ time bunzip2 linux-2.6.28.3.tar.bz2

Using the org.at4j.comp.bzip2.prog.BUnzip2 class:

$ time $JAVA_HOME/bin/java -cp $CLASSPATH dr.org.at4j.comp.bzip2.prog.BUnzip2 linux-2.6.28.3.tar.bz2

LZMA

LZMA compress a Tar archive containing the source code for the Linux kernel. The uncompressed size of the archive is 310292480 bytes.

Command lines:

Using the lzma command:

$ time lzma linux-2.6.28.3.tar

Using the org.at4j.comp.lzma.prog.Lzma class:

$ time $JAVA_HOME/bin/java -cp $CLASSPATH dr.org.at4j.comp.lzma.prog.Lzma linux-2.6.28.3.tar

Uncompress a LZMA compressed Tar archive containing the source code for the Linux kernel.

Command lines:

Using the unlzma command:

$ time unlzma linux-2.6.28.3.tar.lzma

Using the org.at4j.comp.lzma.prog.UnLzma class:

$ time $JAVA_HOME/bin/java -cp $CLASSPATH dr.org.at4j.comp.lzma.prog.UnLzma linux-2.6.28.3.tar.lzma

Tar

Create a Tar archive containing the source code for the Linux kernel.

Command lines:

Using the tar command:

$ time tar cf linux-2.6.28.3.tar linux-2.6.28.3/

Using the org.at4j.tar.prog.Tar class:

$ time $JAVA_HOME/bin/java -cp $CLASSPATH dr.org.at4j.tar.prog.Tar cf linux-2.6.28.3.tar linux-2.6.28.3/

Unpack a Tar archive containing the source code for the Linux kernel.

Command lines:

Using the tar command:

$ time tar xf linux-2.6.28.3.tar

Using the org.at4j.tar.prog.Tar class:

$ time $JAVA_HOME/bin/java -cp $CLASSPATH dr.org.at4j.tar.prog.Tar xf linux-2.6.28.3.tar

Zip

Create a Zip archive containing the source code for the Linux kernel.

Command lines:

Using the zip command:

$ time zip -q -r linux-2.6.28.3.zip linux-2.6.28.3/

Using the org.at4j.zip.prog.Zip class:

$ time $JAVA_HOME/bin/java -cp $CLASSPATH dr.org.at4j.zip.prog.Zip -r linux-2.6.28.3.zip linux-2.6.28.3/

Unpack a Zip archive containing the source code for the Linux kernel.

Command lines:

Using the unzip command:

$ time unzip -q linux-2.6.28.3.zip

Using the org.at4j.zip.prog.Unzip class:

$ time $JAVA_HOME/bin/java -cp $CLASSPATH dr.org.at4j.zip.prog.Unzip -q linux-2.6.28.3.zip