Rackspace cloud taking too long to upload?

Question

Im following rackspace example on file upload to cloud storage on docs. It is works but the upload are taking too loong. Like really longer! No matter what region do I use 17,kb file take more than 3sec is this actual behaviour of rackspace cloud, they really slow?

Im using rackspace with nodejs, whith the help of pacakage named pkgcloud.

  // taken from pkgcloud docs
  var readStream = fs.createReadStream('a-file.txt');
  var writeStream = client.upload({
    container: 'a-container',
    remote: 'remote-file-name.txt'
  });

  writeStream.on('error', function(err) {
    // handle your error case
  });

  writeStream.on('success', function(file) {
    // success, file will be a File model
  });

  readStream.pipe(writeStream);

The purpose here is, I do image processing on the backend then I send back CDN URL to the user, but a user cannot wait too long 2MB took forever to upload -- timeout and held my server until crash since the stream aren't finished yet