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See also: https://github.com/vasi/pixz/issues
CLEANUP
* massive cleanup
* error handling
* signal handling
* globals
* optimized settings
* memory limit
* cpu number
* block size, for max threads on small files
BUGS
* performance lags under IO?
* slow input -> CPUs idle while waiting for input
* safe extraction
* sanity checks, from spec:
- CRCs are already tested, i think?
- backward size should match file
- reserved flags must be zero
- header vs footer flags
- uncompressed size field vs actual uncompressed size
- index vs actual blocks
EFFICIENCY
* more efficient indexing: ranges? sorted? mtree?
* circular buffer > linked list?
DOCUMENTATION
* man pages
* command help
FEATURES
* support multiple streams
* tarball append without decompression
* other archive formats: cpio?
* lzma-like API
* recovery tool (already is, kinda)