Maximum Compression (lossless data compression software)

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About this capture

COLLECTED BY

Organization: Archive Team

Formed in 2009, the Archive Team (not to be confused with the archive.org Archive-It Team) is a rogue archivist collective dedicated to saving copies of rapidly dying or deleted websites for the sake of history and digital heritage. The group is 100% composed of volunteers and interested parties, and has expanded into a large amount of related projects for saving online and digital history.

History is littered with hundreds of conflicts over the future of a community, group, location or business that were "resolved" when one of the parties stepped ahead and destroyed what was there. With the original point of contention destroyed, the debates would fall to the wayside. Archive Team believes that by duplicated condemned data, the conversation and debate can continue, as well as the richness and insight gained by keeping the materials. Our projects have ranged in size from a single volunteer downloading the data to a small-but-critical site, to over 100 volunteers stepping forward to acquire terabytes of user-created data to save for future generations.

The main site for Archive Team is at archiveteam.org and contains up to the date information on various projects, manifestos, plans and walkthroughs.

This collection contains the output of many Archive Team projects, both ongoing and completed. Thanks to the generous providing of disk space by the Internet Archive, multi-terabyte datasets can be made available, as well as in use by the Wayback Machine, providing a path back to lost websites and work.

Our collection has grown to the point of having sub-collections for the type of data we acquire. If you are seeking to browse the contents of these collections, the Wayback Machine is the best first stop. Otherwise, you are free to dig into the stacks to see what you may find.

The Archive Team Panic Downloads are full pulldowns of currently extant websites, meant to serve as emergency backups for needed sites that are in danger of closing, or which will be missed dearly if suddenly lost due to hard drive crashes or server failures.

Collection: ArchiveBot: The Archive Team Crowdsourced Crawler

ArchiveBot is an IRC bot designed to automate the archival of smaller websites (e.g. up to a few hundred thousand URLs). You give it a URL to start at, and it grabs all content under that URL, records it in a WARC, and then uploads that WARC to ArchiveTeam servers for eventual injection into the Internet Archive (or other archive sites).

To use ArchiveBot, drop by #archivebot on EFNet. To interact with ArchiveBot, you issue commands by typing it into the channel. Note you will need channel operator permissions in order to issue archiving jobs. The dashboard shows the sites being downloaded currently.

There is a dashboard running for the archivebot process at http://www.archivebot.com.

ArchiveBot's source code can be found at https://github.com/ArchiveTeam/ArchiveBot.

TIMESTAMPS

The Wayback Machine - https://web.archive.org/web/20230106191700/https://www.maximumcompression.com/

Lossless data compression software benchmarks / comparisons

Maximum Compression's goal is to show the maximum achievable data compression ratio for<br>several filetypes (text, executable, jpeg etc). The best programs for every filetype<br>are compared in a table indicating compression ratios and switches/options used to achieve<br>that compression (SFC). Every program will only be listed once (with<br>the switches yielding the highest possible compression ratio for that test/file). I prefer command<br>line (console) compression programs over GUI ones.

If you are looking for more realistic data like efficiency and (de)compression speed of lossless compression<br>software have a look at the Multiple file compression test benchmarks (MFC).<br>The MFC benchmark lists performance comparisons of nearly all known archivers. The MFC test set<br>consists of dozens of different files types (totaling 510 files, 300+ MB).

If you know of an (experimental) program not listed here or know of a switch combination yielding<br>better results than the one listed please let me know!. Also general improvement suggestions are welcome,<br>simply write an entry in the Guestbook (temporary unavailable).

Last updates:

28-November-2011 : Added SCM 0.0.1b, XP v5 and Crush 0.01. SCM is a good compressor, but is still buggy (e.g.<br>crashes on JPG file with -o option) and options given seem to have no effect on compression level.

19-November-2011 : Added WinRAR 4.1b3, 7-zip 9.25a, NanoZip 0.09a, BSC 3.0.0, Comprox 0.3.0 and PackJPG 2.5.<br>Because of further multi-threading optimizations, Nanozip in default mode, makes a nice jump in<br>compression efficiency and<br>closes the gap to number one, FreeARC. Comprox crashes on the PDF file when using a blocksize 25-June-2011 : Added ZPAQ 2.05, PPMX...