How to clear memory in the request module after getting content from a resource?

Question

Node.js

The situation is as follows:
There are several requests to the site, how, after the request, to delete all the data from the memory left by the request?
Does it have any method?
The garbage collector runs once per minute.
After each request, I would not want to run it ..

request({
  url: 'http://site.com'
},

function( err, response, body ) {
  if( !err && response.statusCode == 200 ) {
    // Манипуляция с полученными данными
    // Удаление данных, которые оставил модуль request
  }
  else {
    
  }
});