example-08.js

"use strict";

var intervalId,
  closures = [];

function createLargeClosure() {
  var largeStr = new Array(1000000).join("x");
  return function lC() {
    return largeStr;
  };
}

function createSmallClosure() {
  var smallStr = "x";
  var largeStr = new Array(1000000).join("x");
  return function sC() {
    return smallStr;
  };
}

function createEvalClosure() {
  var smallStr = "x";
  var largeStr = new Array(1000000).join("x");
  return function eC() {
    eval("");
    return smallStr;
  };
}

function largeClosures() {
  stopInterval();
  intervalId = setInterval(function() {
    closures.push(createLargeClosure());
  }, 1000);
}

function smallClosures() {
  stopInterval();
  intervalId = setInterval(function() {
    closures.push(createSmallClosure());
  }, 1000);
}

function evalClosures() {
  stopInterval();
  intervalId = setInterval(function() {
    closures.push(createEvalClosure());
  }, 1000);
}

function stopInterval() {
  if (intervalId) {
    clearInterval(intervalId);
  }
  intervalId = null;
}

function clear() {
  closures.length = 0;
}

function stopAndClear() {
  stopInterval();
  clear();
}