Function create_file

tests/benches/write_concurrent_benchmark.rs:8–35

(path: &str, size: u64)

use std::thread;

fn create_file(path: &str, size: u64) -> std::io::Result<File> {
    let mut file = OpenOptions::new()
        .read(true)
        .write(true)
        .create(true)
        .truncate(true)
        .open(path)?;

    let mut rng = rand::thread_rng();
    const BUFFER_SIZE: usize = 8192; // 8 KB buffer
    let mut buffer = [0u8; BUFFER_SIZE];

    let full_chunks = size / BUFFER_SIZE as u64;
    let remainder = (size % BUFFER_SIZE as u64) as usize;

    for _ in 0..full_chunks {
        rng.fill(&mut buffer[..]);
        file.write_all(&buffer)?;
    }

    if remainder > 0 {
        rng.fill(&mut buffer[..remainder]);
        file.write_all(&buffer[..remainder])?;
    }

    file.seek(SeekFrom::Start(0))?; // Reset file pointer to the beginning
    Ok(file)
}

fn write_random_bytes(
    mut file: &File,