diff options
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 53 |
1 files changed, 45 insertions, 8 deletions
@@ -1,12 +1,49 @@ -Changes in version 1.10: +Changes in version 1.11: -File specified with option "-o" is now created with write permission for -all if umask allows it, and deleted if lzip is interrupted by the user. +The option "-0", which produces a compression speed and ratio comparable +to those of "gzip -9", has been added to lzip. -Regular files are now open in binary mode in non-POSIX platforms -defining the O_BINARY macro. +Match length limit set by options -1 to -8 has been reduced to extend +range of use towards gzip. Lower numbers now compress less but faster. +(-1 now takes 43% less time for only 20% larger compressed size). -Dictionary size for options -2, -3, -4 and -8 has been changed to -improve linearity of compressed sizes. +(Note that the bidimensional parameter space of LZMA can't be mapped to +a linear scale optimal for all files. If your files are large, very +repetitive, etc, you may need to use the --match-length and +--dictionary-size options directly to achieve optimal performance). -Compiler warnings produced by over-optimization (-O3) have been fixed. +Compression of option -9 has been slightly increased. + +The option "--merge", which tries to produce a correct file merging the +good parts of two or more damaged copies, has been added to lziprecover. + +(To give you an idea of --merge's possibilities, when merging two copies +each of them with one damaged area affecting 1 percent of the copy, the +probability of obtaining a correct file is about 98 percent. With three +such copies the probability rises to 99.97 percent. For large files with +small errors, the probability approaches 100 percent even with only two +copies). + +The option "--repair", which repairs any 1-byte error in the lzma stream +of lzip files, has been added to lziprecover. + +Decompressor has been modified to detect file errors earlier, improving +efficiency of lziprecover's new repair capability. + +The option "--force", which forces overwriting of existing output files, +has been added to lziprecover. + +The option "--output", which sets the name of the output file, has been +added to lziprecover. + +The option "--split", which selects the until now only operation of +splitting multimember files, has been added to lziprecover. + +Lziprecover now needs the operation to be specified. Else it warns the +user and does nothing. + +A warning about fchown's return value being ignored has been fixed. + +"lzip -tvvvv" now also shows file compression ratio. + +Some new examples have been added to the manual. |