<!-- Thank you for reporting a possible bug in Node.js. Please fill in as much of the template below as you can. Version: output of `node -v` Platform: output of `uname -a` (UNIX), or version and 32 or 64-bit (Windows) Subsystem: if known, please specify the affected core module name If possible, please provide code that demonstrates the problem, keeping it as simple and free of external dependencies as you can. --> * **Version**:master branch * **Platform**:Darwin <!-- Please provide more details below this comment. --> When I run benchmark as the [document](https://github.com/nodejs/node/blob/master/doc/guides/writing-and-running-benchmarks.md#running-benchmarks) said, It came out `TypeError: internalBinding is not a function` as below:  Is this a bug, or the document is incomplete ?
