Yeet the laggy reversed DNS lookup for literal IP server addresses
Extracted from the yeetServerIpReversedDnsLookup option in TweakerMore Mod
What & Why & How
For servers whose addresses are represented solely by a literal IP, e.g. 192.168.2.10:25565, disable reverse DNS lookups in the corresponding InetAddress object
Many non-loopback IPs lack associated domain names, which makes reverse lookups time-consuming
// java.net.InetAddress#getHostName(boolean)
String getHostName(boolean check) {
if (holder().getHostName() == null) { // It will be null if InetAddress.getByName() received a literal IP
holder().hostName = InetAddress.getHostFromNameService(this, check); // <-- takes forever
}
return holder().getHostName();
}
This option sets the domain of those servers directly to their IP, bypassing the reverse DNS check
This results in a 1s ~ 5s reduction in time for servers with literal IP address. Affects the following environments:
- Pinging the server in the server list screen
- Connecting to the server
Environment
- Client-side only
- Fabric / Forge / NeoForge mod loader. No extra requirement is needed
