About DNS implementation in got module

[Naveenkumar-S]

Hi community,
Is got uses dns.lookup() or dns.resolve() for DNS resolving? In case if it is dns.lookup() under the hood, shall I pass an instance of CacheableLookup to cache the resolutions as well as which uses dns.resolve*()?
Thanks in advance

[sindresorhus]

Got uses Node's default DNS resolution which is dns.lookup() under the hood (via the http/https modules).

For DNS caching, yes, you should use the cacheable-lookup package. You can pass it to Got like this:

import CacheableLookup from 'cacheable-lookup';

const cacheable = new CacheableLookup();

await got('https://example.com', {
	dnsLookup: cacheable.lookup
});

This is definately recommended if you're making many requests to the same hosts, as it can significantly improve performance by avoiding redundant DNS lookups.