GLib.usleep

function usleep(microseconds: Number(gulong)): void {
    // Gjs wrapper for g_usleep()
}
  

Pauses the current thread for the given number of microseconds.

There are 1 million microseconds per second (represented by the #G_USEC_PER_SEC macro). GLib.usleep may have limited precision, depending on hardware and operating system; don't rely on the exact length of the sleep.