#! iojs --expose-gc $mode
// creates 10e3 maps with 10 elements each
// runs 10e3 gc() after
// modes: ["m", "w"]
//   m: use a normal map
//   w: use a weak map
var maps;
function create_maps(c, n) {
  maps = [];
  for (var m = 0; m < c; m++) {
    var map = new Map();
    var keys = [];
    for (var i = 0; i < n;i++) {
      keys[i] = {};
      map.set(keys[i], i);
    }
    maps[m] = {
      map: map,
      keys: keys
    };
  }
}
function create_weak_maps(c, n) {
  maps = [];
  for (var m = 0; m < c; m++) {
    var map = new WeakMap();
    var keys = [];
    for (var i = 0; i < n;i++) {
      keys[i] = {};
      map.set(keys[i], i);
    }
    maps[m] = {
      map: map,
      keys: keys
    };
  }
}

if (process.argv[2]=='m') create_maps(10000, 10);
if (process.argv[2]=='w') create_weak_maps(10000, 10);
gc();
gc();
var start = process.hrtime();
for (var i = 0; i < 1000; i++) {
  gc();
}
var end = process.hrtime();
console.log(process.argv[2], end[0] - start[0], end[1] - start[1])