Rechunk000pak Better -

Align chunk start offsets to 4096 bytes.
Many tools ignore this → extra read amplification.

New PAK chunks should start at next_multiple_of_4096(current_offset).

struct BetterRechunker 
    chunk_size: u64, // target
    align_to: u64,   // usually 4096
    compress: Option<CompressionType>,
    parallel: u8,
fn rechunk_better(source_pak: &Path, target_pak: &Path) -> Result<()> 
let old_index = parse_pak_directory(source_pak)?;
let mut new_writer = PakWriter::new(target_pak, chunk_size, align_to); rechunk000pak better
// Build chunk assignment
let mut chunks: Vec<Chunk> = Vec::new();
for entry in old_index.entries 
    let file_data = read_file_data(source_pak, entry.offset, entry.size)?;
    let compressed = compress_chunk(&file_data, compression_type)?;
    let chunk = Chunk::new(compressed, entry.hash);
    chunks.push(chunk);
// Write chunks in parallel (chunks independent)
let chunk_offsets = write_chunks_parallel(&mut new_writer, &chunks)?;
// Write new directory
new_writer.write_directory(&old_index.entries, &chunk_offsets)?;
// Validate
validate_rechunk(target_pak, &old_index)?;
Ok(())

Split work into:

Use a thread pool (e.g., in Rust or Go). Avoid Python GIL unless using multiprocessing. Align chunk start offsets to 4096 bytes

Selecting the "better" chunk size is critical.

Topic: Optimization of Chunking Strategies in High-Performance Computing Date: October 26, 2023 Split work into: