Performance
Wifi
Antennas enables wifi 5 (ac) speeds. The project it originally forked from only had wifi 4 (n) speeds.
Wireless speeds will vary based on the generation of Raspberry Pi used and whether it is overclocked or not. Speeds below are measured using fast.com.
Overclocking
You can safely overclock by enabling turbo mode. You should see performance gains of about 50%. This comes at the expense of higher energy usage.
Warning: Changing other overclock settings, other than what is listed here, may void your warranty. Overclocking, especially without proper cooling, may slightly reduce the lifespan of your device.
To enable turbo mode in Ubuntu Core you can set force_turbo=1, then restart for the change to take effect:
sudo snap set system pi-config.force-turbo=1
sudo reboot
To verify that overclocking worked you can check the CPU frequency with lscpu | grep 'MHz' which returns:
| Device | Overclocked | Min MHz | Max MHz | Observations |
|---|---|---|---|---|
| Pi 4b | No | 600 | 1500 | Wireless speed is about 80 Mbps |
| Pi 4b, Ubuntu Core 20 | Yes | 1500 | 1500 | Increases wireless speed to about 100-110 Mbps |
| Pi 4b, Ubuntu Core 22 | Yes | 1800 | 1800 | Increases wireless speed to about 110-150 Mbps |
| Pi 5, Ubuntu Core 24 | No | 1000 | 2400 | Increases wireless speed to about 245-250 Mbps |
| Pi 5, Ubuntu Core 24 | Yes | 2400 | 2400 | Increases wireless speed to about 260-270 Mbps |
Thermals
All Raspberry Pi models will throttle starting at 80 degrees celsius and throttle even more at 85 degrees celsius.
Temperature can be checked by running cat /sys/class/thermal/thermal_zone0/temp. The result will be a temperature in millidegrees celsius, so divide by 1000 to convert to celsius.
DNS
DNS caching is enabled and the size of the cache has been increased.
Instead of relaying DNS traffic from dnsmasq to dnscrypt, the dnsmasq DHCP server advertises dnscrypt directly.
Uses one of the fastest DNS resolvers: Cloudflare's 1.1.1.1.
DHCP
Rapid commit is enabled for faster ipv4 address assignment.