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Diffstat (limited to 'programs/lz4.1.md')
| -rw-r--r-- | programs/lz4.1.md | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/programs/lz4.1.md b/programs/lz4.1.md index 56c0053..06c06cf 100644 --- a/programs/lz4.1.md +++ b/programs/lz4.1.md @@ -20,9 +20,9 @@ DESCRIPTION `lz4` is an extremely fast lossless compression algorithm, based on **byte-aligned LZ77** family of compression scheme. -`lz4` offers compression speeds of 400 MB/s per core, linearly scalable with -multi-core CPUs. -It features an extremely fast decoder, with speed in multiple GB/s per core, +`lz4` offers compression speeds > 500 MB/s per core, +linearly scalable with multi-core CPUs. +It features an extremely fast decoder, offering speed in multiple GB/s per core, typically reaching RAM speed limit on multi-core systems. The native file format is the `.lz4` format. @@ -34,7 +34,7 @@ Differences are : * `lz4` compresses a single file by default (see `-m` for multiple files) * `lz4 file1 file2` means : compress file1 _into_ file2 * `lz4 file.lz4` will default to decompression (use `-z` to force compression) - * `lz4` preserves original files + * `lz4` preserves original files (see `--rm` to erase source file on completion) * `lz4` shows real-time notification statistics during compression or decompression of a single file (use `-q` to silence them) @@ -185,9 +185,15 @@ only the latest one will be applied. * `-BD`: Blocks depend on predecessors (improves compression ratio, more noticeable on small blocks) +* `-BX`: + Generate block checksums (default:disabled) + * `--[no-]frame-crc`: Select frame checksum (default:enabled) +* `--no-crc`: + Disable both frame and block checksums + * `--[no-]content-size`: Header includes original size (default:not present)<br/> Note : this option can only be activated when the original size can be |