DNS cache for proxying to remote server?

[Rush]

While I am primarily doing proxying to localhost servers I have experimented today with proxying to a remote server and it seems DNS query is being done on every request substantially increasing the request time. Should I query the IP from DNS manually or is there a cleaner way?

[Rush]

On a side-note, what performance penalty should I be looking at while proxying to remote host?
Having put my dns name to /etc/hosts I expected to see not more than 10% penalty but I what I see is:

• Native request to remote server ~40ms
• Request proxied through node-http-proxy with host in /etc/hosts: ~80ms
  I am measuring the time both in chrome in code from doing request to getting proxyRes.

[aaronmaturen]

I found that by using https://www.npmjs.com/package/dnscache I'm able to get my performance tests to external domains down to about 6ms from 40ms... with just the default settings in the readme

const require('dnscache')
dnscache({
   "enable" : true,
  "ttl" : 300,
  "cachesize" : 1000
})