Function main

examples/memory_test.rs:160–334

Main entry point for the memory benchmark.

()

/// Main entry point for the memory benchmark.
fn main() -> Result<(), Box<dyn std::error::Error>> {
    const ITEM_COUNT: usize = 200_000;
    // Approx size: 200k * ~600 bytes = ~120 MB raw data

    let dir = tempdir()?;
    let path_parcode_raw = dir.path().join("data_raw.par");
    let path_parcode_lz4 = dir.path().join("data_lz4.par");
    let path_bincode = dir.path().join("data.bin");

    println!("\n=== PARCODE V3 MEMORY & PERFORMANCE PROFILING ===\n");

    // 1. SETUP
    ALLOCATOR.reset();
    let data = generate_dataset(ITEM_COUNT);
    let gen_mem = ALLOCATOR.current();
    println!(
        " -> Dataset Memory Footprint: {:.2} MB\n",
        gen_mem as f64 / 1024.0 / 1024.0
    );

    // ------------------------------------------------------------------------
    // PHASE 1: WRITE
    // ------------------------------------------------------------------------
    println!("--- PHASE 1: WRITE ---");

    // A. Parcode (Default / No Compression)
    {
        ALLOCATOR.reset();
        let start = Instant::now();
        Parcode::save(&path_parcode_raw, &data)?;
        let dur = start.elapsed();
        let peak = ALLOCATOR.peak() as f64 / 1_048_576.0;
        let size = std::fs::metadata(&path_parcode_raw)?.len() as f64 / 1_048_576.0;

        println!(
            "[Parcode Raw]    Time: {:.2?}, Peak RAM: {:.2} MB, Disk: {:.2} MB",
            dur, peak, size
        );
    }

    // B. Parcode (Simulated LZ4 Config via Wrapper)
    {
        // Wrap the data to force LZ4 injection
        let wrapped_data = Lz4Compressed(&data);

        ALLOCATOR.reset();
        let start = Instant::now();

        // We save the wrapper. The wrapper's visit() forces LZ4 on the Vec.
        // Note: Parcode::save takes &T.
        Parcode::save(&path_parcode_lz4, &wrapped_data)?;

        let dur = start.elapsed();
        let peak = ALLOCATOR.peak() as f64 / 1_048_576.0;
        let size = std::fs::metadata(&path_parcode_lz4)?.len() as f64 / 1_048_576.0;

        println!(
            "[Parcode LZ4]    Time: {:.2?}, Peak RAM: {:.2} MB, Disk: {:.2} MB",