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Benchmark Disk Write Speed in Python with tempfile

Benchmark raw disk write performance by writing a temporary file in 1MB chunks and measuring throughput in MB/s.

import os
import tempfile
import time

def benchmark_write(size_mb=50):
    size_bytes = size_mb * 1024 * 1024
    chunk = b'x' * 1024 * 1024  # 1 MB chunk

    with tempfile.NamedTemporaryFile(delete=True) as tmp:
        start = time.perf_counter()
        written = 0
        while written < size_bytes:
            …

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