v0.11

• add terminal visualizer with Win98-style block grid

Add -v flag rendering real-time colored block grid showing transfer progress.
States: pending (dim □), processing (blink □), zero (grey), compressed (blue),
raw (orange), skipped (green). Async non-blocking render, cross-platform terminal
size detection (TIOCGWINSZ for Unix, GetConsoleScreenBufferInfoEx for Windows).

v0.10

Optimize HDD transfer throughput

• server: shared OrderedWriter serializes concurrent writes into a near-sequential stream (SubmitAndWait keeps per-block acks)
• writer: periodic async SyncFileRange writeback to smooth flushing
• reader: zero-copy block handoff + AdviseDontNeed to preserve read-ahead
• sysfstune: best-effort 4MB read-ahead for /dev/ block devices
• verified live over SSH: full upload/download matrix passes
• harden protocol, SSH transfer, and edge-case test coverage for remote/local transfers

v0.9

• little fixes
• skip blocks fix
• cache for synced blocks

v0.8

network: robustness fixes and Windows support

• Add Windows build with drive enumeration (-a flag) and physical drive access
• Add server-side progress stats with -P flag to suppress in SSH mode
• Add TCP keep-alive, per-loop deadlines, and io.ReadFull throughout
• Add retry loop with reconnect for failed blocks (client)
• Fix: reset deadline before data payload read in serverHandleReq
• Fix: check connWrite error on hash send, return on failure
• Fix: remove double SetWriteDeadline from AutoReconnectTCP.Write
• Remove dead processBlockJob function

v0.7

• fix -n flag for remote ssh
• add auto-copy binary to remote via ssh
• optimize binary size

v0.6

feat: add sparse file support, encryption, compression levels, and comprehensive tests

• Add ChaCha20-Poly1305 encryption with auto-generated keys (-e flag)
• Add compression level control (-L fast/default/better/best)
• Add IP binding option (-i flag)
• Optimize zero block handling - no network transfer, preserves sparse holes
• Fix block calculation off-by-one bug affecting truncation
• Add buffer pools for decompression to reduce GC pressure
• Increase zero buffer from 1MB to 100MB
• Add 20 new flag tests (multi-worker, encryption, compression, block sizes)
• Update README with all features and examples

All 63 tests passing.

v0.5

• Added stream encryption/decryption
• Performance optimizations and memory leak fixes:
  • Optimize isZeroBlock with 8-byte chunk comparison (~10x faster)
  • Add TCP buffer tuning (4MB buffers, TCP_NODELAY)
  • Add compression level flag (-L fast/default/better/best)
  • Add FNV hash pool for reduced allocations
  • Fix goroutine leak in server with context cancellation
  • Add ChecksumCache.Delete() for optional memory cleanup
  • Clear original data when compressed version is used
  • Cache AEAD cipher instance globally
  • Add shared zero buffer for zero block writes
  • Add safety check for nil data in processPrecomputedBlock

v0.4

Add parallel hash+compression pipeline for HDD-friendly multi-worker …

v0.3

added download mode

added binding to specific IP address

• added binding to specific IP address