NotUsedCode.md

Not used code

Source of example

Memory can't be released because it can't be allocated before

function f() {
  var some = [];
  while(some.length < 1e6) {
    some.push(some.length);
  }
  function unused() { some; } //causes massive memory leak
  return function() {};
}

var a = [];
var interval = setInterval(function() {
  var len = a.push(f());
  document.getElementById('count').innerHTML = len.toString();
  if (len >= 500) {
    clearInterval(interval);
  }
}, 10);

How to fix: investigate and refactor code, try to remove not used functional

function f() {
  return function() {};
}

var a = [];
var interval = setInterval(function() {
  var len = a.push(f());
  document.getElementById('count').innerHTML = len.toString();
  if (len >= 500) {
    clearInterval(interval);
  }
}, 10);