const si = require("systeminformation");

async function getSystemStats() {
  const [cpu, memory, battery, network] = await Promise.all([
    si.currentLoad(),
    si.mem(),
    si.battery(),
    si.networkStats()
  ]);

  return {
    cpu: cpu.currentLoad,
    memory: memory.active,
    battery: battery.percent,
    network
  };
}

console.log(await getSystemStats());