closurepattern.js

function ClosurePattern() {
    this.someMethod = function someMethod() {
        console.log('foo');
    }
}
var closurePattern = new ClosurePattern();

I wouldn't call this the closure pattern. It's just a really inefficient way to put functions on an object. Rather, I would do:

function ClosurePattern() {
  // Define some functions in the local scope
  function someMethod() {
    console.log('foo');
  } 
  // Export only what you want exposed using the closure
  return { someMethod: someMethod };
}
var closurePattern = ClosurePattern();

But, yeah, the same performance rules apply as the original.