Contents is just a txt file with the text of this post. With 64 MB dictionary and 16 threads will use up to 5 GB of ram to compress your archives, but 4-8 compression threads and up to 8 MB dictionary is more common, so memory usage will be less (up to ~1 GB of memory)Įdit: attached is a zip file compressed with PPMd algorithm. WinRAR defaults to maximum 4 MB dictionary I think, I'm not sure. Lzip7z: This plugin allows you to open, create, or modify LZIP archives (used on Unix-like systems based on ). The 7zip format of 7zip is much better than ZIP and even RAR in some cases, and you can use very big dictionaries and can use a lot of threads (for example with 16 threads and 1.5 GB dictionary, 7zip could use up to 145 GB of RAM to compress something, if you want absolutely the maximum compression on huge amount of data, like GBs of content) but that's ridiculous extremes. WinRar lets you choose between using the older RAR algorithms (until version 5) and newer algorithms which are not compatible with older rar decompressors. Lzip uses a simplified form of the 'Lempel-Ziv-Markov chain-Algorithm' (LZMA) stream format and provides a 3 factor integrity checking to maximize interoperability and optimize safety. It's like the same story with RAR archives. Lzip is a lossless data compressor with a user interface similar to the one of gzip or bzip2. the built in zip thing in Windows 7 opens the archive and shows the files in it, but can't extract a file compressed using the non-default algorithm PPMd (which is very very good at compressing text files or files with lots of words like html pages), the extraction fails with an error. simply choose from the compression method BZip2 or LZMA or PPMd 7zip supports those and also allows you to create such zip archives. It produces, on average, compressed texinfo manuals a 19 smaller and man pages a 6 smaller than gzip without noticeable differences in decompression speed. WinZIP implemented several compression methods in ZIP files that are not using the standard DEFLATE algorithm. Lzip is probably the best compressor for local online documentation (texinfo manuals and man pages). I'm not even sure it opens all non-standard zip files. It provides the capability for decompressing 7ZIP, ZIP/unzip, TAR/untar LZIP/unlzip, BZIP2/unbzip2, and GZIP/ungzip with forward-only reading and files.
0 Comments
Leave a Reply. |