About The File Archiver JAR
JAR is a PC file archiver that compresses files into a disk space saving archive using state of the art archiver technology. It is fast, powerful, reliable, and has a rich set of features (see below).
JAR has a similar command and option feature set to the PC archiver ARJ,
but it is not archive compatible with ARJ. JAR comes in a 16 bit DOS version
and a 32 bit Windows version.
The Advantages of JAR:
Year 2000 compliance
Compatible with DOS or Windows 95 and NT
Supports long filenames in Windows 95
File version management
Currently ranks as one of the best in compression in terms of size reduction of
the currently available archivers
Ability to process and archive more than 50,000 files at a time
Ability to store multiple backups in the same archive using incremental compression
Support of ANSI style comments
MS-DOS international language support for the proper casing of filenames
Supports nested response files
Archives that can span diskettes
Built-in facility to recover files from broken archives
Optional long filenames translation into short names when extracting files in DOS
Product Comparisons
We compared JAR with some of the leading commercial archivers: PKZIP 2.04g, UltraCompressor II Revision 3, RAR 2.00 BETA for Win32. LHA 2.X and ARJ 2.x are not included because their compression size numbers are very similar to those of PKZIP 2.04g.
COMPUTER:
Pentium-100, 8 MB memory, no external cache, operating system: Windows 95. Additional specific information is included in the file jar.doc.
FILE SET:
The Calgary Corpus
(18 files totaling 3,251,493 bytes, popular file set used to compression rates.)
| Archiver |
Method |
Compression Time |
Compressed Size |
| JAR32 |
Default |
22s |
914,020 (100%) |
| RAR 2.00 beta 3 |
Default solid |
55s |
997,418 (109%) |
| UC2 rev 3 |
Default |
44s |
1,051,516 (115%) |
| PKZIP 2.04 |
Default |
17s |
1,074,550 (118%) |
FILE SET:
ftp.microsoft.com/developr/drg/OLE-info/COMSpecification/COM_Spec_DOC.ZIP
(15 files totaling 1,911,296 bytes, microsoft Word documents.)
| Archiver |
Method |
Compression Time |
Compressed Size |
| JAR32 |
Default |
12s |
386,532 (100%) |
| RAR 2.00 beta 3 |
Default solid |
23s |
433,214 (112%) |
| UC2 rev 3 |
Default |
20s |
504,304 (130%) |
| PKZIP 2.04 |
Default |
8s |
544,568 (141%) |
FILE SET:
Microsoft Visual C++ 1.52
(462 files and directories totaling 18,806,153 bytes, mix of executables, text, DLLs and object files.)
| Archiver |
Method |
Compression Time |
Compressed Size |
| JAR32 |
Default |
177s |
7,221,727 (100%) |
| RAR 2.00 beta 3 |
Default solid |
300s |
7,856,362 (109%) |
| UC2 rev 3 |
Default |
282s |
8,556,558 (118%) |
| PKZIP 2.04 |
Default |
96s |
8,945,476 (124%) |
| Archiver |
Method |
Compression Time |
Compressed Size |
| JAR32 |
Maximum |
264s |
5,984,311 (83%) |
| PKZIP 2.04 |
Default |
96s |
8,945,476 (124%) |