NodObjC performance

[sandeepmistry]

Every call to the NodObjC seems to 1 - 9ms, for example:

var $ = require('NodObjC');

$.import('Foundation');

setInterval(function() {
  console.time('dict');
  var $options = $.NSMutableDictionary('alloc')('init');
  console.timeEnd('dict');
}, 1000);

We should try out making a custom .framework that extends CoreBluetooth that serializes objects to JSON strings to cut down on the $ calls in Node.js land, and see what impact this has on performance.

Not a priority at this point in time though.