33 mins on 2011 MacBook Pro 2.2 GHz Intel Core i7
This is not a direct port of smallpt. Look at the inital commit to see a more minimal port to Java.
Copyright 2011 Ronald Chen Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
You can also clone the project with Git by running:
$ git clone git://github.com/Pyrolistical/smallpt