I am trying to reduce the calls that go to dns.lookup in order to reduce the C++ libuv threads allocation so I am using this library.
How I am testing that, by running this code:
const nodeDnsLookup = dns.lookup;
let dnsLookupCounter = 0;
dns.lookup = (...args) => {
console.log(`I am calling the native node dns lookup ${JSON.stringify(args)}, number ${dnsLookupCounter}`);
dnsLookupCounter++;
return nodeDnsLookup(...args);
};
so, without installing this library I can see a lot of dns lookups.
Now after I installed this library with its global http(s) agent as follows:
import CacheableLookup from 'cacheable-lookup';
const cacheable = new CacheableLookup();
cacheable.install(http.globalAgent);
cacheable.install(https.globalAgent);
I was expecting the number of dns lookups would go down and cache hits to happen, but it did not!
I see from the logs that the same hostname with the same family are still calling the native dns.lookup and not served from a cache.
Hello there,
I could be missing something here.
I am trying to reduce the calls that go to
dns.lookup
in order to reduce the C++ libuv threads allocation so I am using this library.How I am testing that, by running this code:
so, without installing this library I can see a lot of dns lookups.
Now after I installed this library with its global http(s) agent as follows:
I was expecting the number of dns lookups would go down and cache hits to happen, but it did not! I see from the logs that the same hostname with the same family are still calling the native dns.lookup and not served from a cache.