RSS All releases tagged Stable

  •  06 Mar 2013 15:36

Release Notes: This update release adds several performance and security enhancements. AES code now includes AES-NI and VPAES optimizations. The fast XSalsa20 encryption algorithm has been added. Encryption key length can now be set at runtime (128/256 bits). Nonce, salt, etc. are now HMACed, and nonce generation randomized. Merkle Tree hashing via OpenMP is now used for all hashes when compressing an entire file in a single chunk (solid archive mode). Deduplication performance is improved by 95%. There is improved XML detection in adaptive modes. The file format has been updated, but backward compatibility retained.

  •  06 Jan 2013 00:24

Release Notes: This release adds many improvements and fixes, including ones for performance and stability. It adds the KECCAK Sha3 message digest. A new fast Delta variant detects embedded tables of binary numeric data and RLE encodes them. A matrix transform allows better compression of a Dedupe index. LZ4 and XXHash have been updated. The test suite has been expanded. Pcompress now builds without warnings with strict compiler flags. Alternate locations for external libraries are handled properly, and older OpenSSL versions up to 0.9.8e work. The debug statistics mode now prints additional throughput statistics.

  •  27 Nov 2012 04:38

Release Notes: This release introduces a bunch of fixes and optimizations along with more tests for error conditions. Security has been improved with IPSec-style message authentication and header CRC32 checksums in plain non-crypto mode. Zlib(gzip) compression has been made slightly faster. The rolling hash has been tweaked to improve block size distribution and chunking behavior of deduplication, resulting in an improved dedupe ratio. The compressed archive version has been bumped while retaining compatibility to decompress older non-encrypted versions.

  •  10 Nov 2012 01:32

Release Notes: This is the first stable release of Pcompress. An extensive test suite has been added and used to validate and fix bugs. The file format is versioned, and backward compatiblity will be maintained. Deduplication parameters have been tweaked to get better distribution of content-aware blocks and an improved dedupe ratio. Adaptive compression modes have been improved with more heuristics. This release also provides best-in-class SHA256 digest performance on x86 platforms. Pcompress today provides a combination of features and performance which makes it unique among data compression utilities.


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