CYBERSPEED

async function measureDownload() {
    // Menyiapkan 6 koneksi paralel @1MB = 6MB beban total
    const threads = 6;
    const bytesPerThread = 1000000;
    
    // Menyalakan stopwatch milidetik
    const start = performance.now();
    const promises = [];
    
    for (let i = 0; i < threads; i++) {
        promises.push(
            fetch(`https://speed.cloudflare.com/__down?bytes=${bytesPerThread}`)
            .then(res => res.blob()) // Menunggu hingga seluruh body diterima
        );
    }
    
    // Eksekusi ke-6 koneksi secara bersamaan!
    await Promise.all(promises);
    
    // Mematikan stopwatch
    const end = performance.now();
    
    // Rumus Kalkulasi: (Total Megabit) / (Durasi Detik) = Mbps
    const durationSeconds = (end - start) / 1000;
    const speedMbps = ((threads * bytesPerThread * 8) / durationSeconds) / 1000000;
    
    return parseFloat(speedMbps.toFixed(1));
}