Two functions to find the longest possible variable length, which turns out the be the max memory allocation to a node process

variable_name.js

#!/usr/bin/env node 
function name1(err) {
  var name = '';
  var interation = 0;
    for (var i = 0; i < 9007199254740992; ++i) {
      delete global[name];
      name += 'x';
      global[name] = 42;
      iteration = i;
      //speed up the printing, console.log is a snail
      if ((i%2) == 0) {
        console.log(i);
      }
      if(err){
        console.log("max length of var name: ", i);
      }
    }
}
function name2(err) {
  var name = '';
  var interation = 0;
    //for max length of int
    for (var i = 0; i < 9007199254740992; ++i) {
      name += 'x';
      iteration = i;
      if (err){
        console.log("max len of var name: ", i);
      }
    //print out the premature termination
    }
  console.log(eval(name));
}