@eeandrew 这周刚好把 co 揉进了 thunks，https://github.com/thunks/thunks，可以交流~

贴个demo：

var Thunk = require('../thunks.js')();
var fs = require('fs');

var size = Thunk.thunkify(fs.stat);

Thunk(function* () {
  // 3 concurrent stat()s at a time
  var a = yield [size('.gitignore'), size('thunks.js'), size('package.json')];
  var b = yield [size('.gitignore'), size('thunks.js'), size('package.json')];
  var c = yield [size('.gitignore'), size('thunks.js'), size('package.json')];
  console.log(a);
  console.log(b);
  console.log(c);

})(function* () {
  // 9 concurrent stat()s
  var a = [size('.gitignore'), size('thunks.js'), size('package.json')];
  var b = [size('.gitignore'), size('thunks.js'), size('package.json')];
  var c = [size('.gitignore'), size('thunks.js'), size('package.json')];
  var d = yield [a, b, c];
  console.log(d);

})(function* () {
  var a = size('.gitignore');
  var b = size('thunks.js');
  var c = size('package.json');
  var res = yield [a, b, c];
  console.log(res);
})();