What's new in SREP (formerly SuperREP) 3.2
Jul 12, 2013
- -m2 -lN now is the same as -m3 -lN -cN: compression ratio is average between -m1 and -m3, while speed is the same as in old versions
- -a0: the same compresssion ratio as -a1, memory usage is smaller by 5-10%, but 1.5-2x slower
- -a32/-a64: sometimes faster than -a16 (only with large pages), but needs even more memory
- -slp[+/-/]: force/disable/try(default) large pages support
- Minor changes:
- -v[0..2]: verbosity level
- -pcMAX_OFFSET: print performance counters for matches closer than MAX_OFFSE
- -l64k/-c1mb syntax support (k/m/kb/mb suffixes for kilobytes/megabytes)
- Both 32-bit and 64-bit default executables are compiled with GCC 4.7
- 32/64-bit dynamic/static linux builds
New in SREP (formerly SuperREP) 3.1 (Jul 12, 2013)
- -m1f -a4 now is default compression mode, for quick and dirty compression. Use -m3f -a1 for maximum compression
- 32-bit version became 1.5x faster than in SREP 3.0
- gcc64 version: srep64g.exe. srep32i/srep64i still are the fastest executable
- bugfix: it was impossible to allocate more than 4 gb for bitarr[]
- bugfix: 32-bit version now uses only 1.5 gb for future-lz decompression by default (instead of 4gb-1 that's too much)
New in SREP (formerly SuperREP) 3.01 (Jul 12, 2013)
- speed up the 32-bit executable by calculating 32-bit hash (instead of 64-bit one); it may hurt speed/compression on very large files
New in SREP (formerly SuperREP) 1.5 (May 20, 2010)
- -m1: old method (compression memory = 6-7% of filesize, check matches by SHA1 digest)
- -m2: new, default method (compression memory = 2-3% of filesize, check matches by rereading old data)
- -index option - keep index of compressed data in separate file in order to improve compression ratio
- 64-bit executable that's still 100% compatible but faster than 32-bit one
New in SREP (formerly SuperREP) 1.0 (May 20, 2010)
- -delete option that delete source file after successful (de)compression
- checking of -l value
New in SREP (formerly SuperREP) 0.8 (May 20, 2010)
- better compression due to improved hashing and compressed format
- faster compression on files
New in SREP (formerly SuperREP) 0.7 (May 20, 2010)
- reduced memory usage down to 6-8% of filesize. For example, 24gb file needs 256+256+960 mb memory chunks
- now hash keeps address of the last chunk with the same contents
- hashing improved a little
- fixed WinXP crashing bug
New in SREP (formerly SuperREP) 0.6 (May 20, 2010)
- fixed 64-bit version, now it properly handles files >2gb
- fixed decompresion with non-default -l
- -s prints stats after each block
New in SREP (formerly SuperREP) 0.5 (May 20, 2010)
- first version that was able to compress and extract data