export function formatSpeed(bytesPerSecond: number): string {
  if (bytesPerSecond < 1024) return `${bytesPerSecond.toFixed(0)} B/s`
  if (bytesPerSecond < 1024 * 1024) return `${(bytesPerSecond / 1024).toFixed(1)} KB/s`
  return `${(bytesPerSecond / (1024 * 1024)).toFixed(1)} MB/s`
}