dnsmasq/hostapd 提供 DHCP 地址的速度很慢

Question

我有一个运行 hostapd 和 dnsmasq 的嵌入式系统作为 wifi 接入点。客户端（Macbook pro、戴尔笔记本电脑、iPhone、Android 平板电脑）与 AP 关联/身份验证和获取 IP 地址之间的时间非常重复，需要 11 秒。

看来多个 dhcpdiscover/offers 几乎同时通过，然后是 dhcprequest 和 dhcpack：

Apr  5 23:27:01 AP daemon.info hostapd: wlan0-ap: STA b8:e8:56:2d:45:ae IEEE 802.11: authenticated
Apr  5 23:27:01 AP daemon.info hostapd: wlan0-ap: STA b8:e8:56:2d:45:ae IEEE 802.11: associated (aid 2)
Apr  5 23:27:01 AP daemon.info hostapd: wlan0-ap: STA b8:e8:56:2d:45:ae RADIUS: starting accounting session 5521BC1F-00000007
Apr  5 23:27:01 AP daemon.info hostapd: wlan0-ap: STA b8:e8:56:2d:45:ae WPA: pairwise key handshake completed (RSN)
Apr  5 23:27:13 AP daemon.info dnsmasq-dhcp[734]: DHCPDISCOVER(wlan0-ap) b8:e8:56:2d:45:ae 
Apr  5 23:27:13 AP daemon.info dnsmasq-dhcp[734]: DHCPOFFER(wlan0-ap) 10.1.1.166 b8:e8:56:2d:45:ae 
Apr  5 23:27:13 AP daemon.info dnsmasq-dhcp[734]: DHCPDISCOVER(wlan0-ap) b8:e8:56:2d:45:ae 
Apr  5 23:27:13 AP daemon.info dnsmasq-dhcp[734]: DHCPOFFER(wlan0-ap) 10.1.1.166 b8:e8:56:2d:45:ae 
Apr  5 23:27:14 AP daemon.info dnsmasq-dhcp[734]: DHCPREQUEST(wlan0-ap) 10.1.1.166 b8:e8:56:2d:45:ae 
Apr  5 23:27:14 AP daemon.info dnsmasq-dhcp[734]: DHCPACK(wlan0-ap) 10.1.1.166 b8:e8:56:2d:45:ae Allans-MBP

如何加快客户端获取 IP 地址的速度？