Not seeing improvements when using with request-promise

[rvillane]

Hi, I have multiple apps written in node 10, multiple apps talk to the same target apps, then I was hoping to gain a performance improvement by caching DNS lookup, however in my case, those lookups are not executed explicitly, instead uses request-promise NPM module and tried the example below making multiple calls to the same target URL, however when is executed without dns-lookup-cache, got comparable results.

Am I using the library incorrectly ?

const rp = require('request-promise');
const {lookup} = require('dns-lookup-cache');

function querySite() { 
    return new Promise((resolve, reject) => {
        rp({
            url: 'https://en.wikipedia.org/wiki/Costa_Rica',
            method: 'GET',
            lookup: lookup
        })
        .then(response => {
            resolve(response);
        })
        .catch(error => {
            reject(error);
        });              
    });            
}

const init = async () => {
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
    querySite().then(res => { console.log('Success'); }).catch(err => { console.log(`Error ${err}`); });
}
init();