z.js

#!node --expose-gc
var zlib = require('zlib');
var buffer = new Buffer('eJzT0yMAAGTvBe8=', 'base64');
function nullfun(){
};

var cnt = process.argv[2] || 1e3;
cnt = +cnt
var c = cnt
//c = 2

// set here just to not treat the memoryUsage tracking
// as a leak itself.
var startMem = process.memoryUsage()
var didStartMem = false

function test() {
  try { gc() } catch (e) {}

  debugger

  if (c -- <= 0) return end()
  var u = process.memoryUsage()
  if (!didStartMem) {
    startMem = u
    didStartMem = true
  }

  console.log(u, c);
  var z = zlib.Unzip()
  z.on("end", process.nextTick.bind(process, test))
  // z.on("end", test)
  z.end(buffer);
};

// process.nextTick(test);
test()

function end () {
  console.error("ending...")
  setTimeout(function () {
    var endMem = process.memoryUsage()
    console.error("start", startMem)
    console.error("end  ", endMem)
    var diff = Object.keys(startMem).reduce(function (s, k) {
      s[k] = endMem[k] - startMem[k]
      return s
    }, {})
    console.error("diff ", diff)
    var avgLeak = Object.keys(startMem).reduce(function (s, k) {
      s[k] = diff[k] / cnt
      return s
    }, {})
    console.error("leak ", avgLeak)
  }, 500)
}