docs: function prepareProfile(leaf, basePath) {
  	var backup = Error.prepareStackTrace,
  		err = new Error,
  		callSite
  	Error.prepareStackTrace = function (err, stack) {
  		return stack[0]
  	}
  	Error.captureStackTrace(err, leaf)
  	callSite = err.stack
  	Error.prepareStackTrace = backup
  	return {
  		file: path.relative(basePath, callSite.getFileName()),
  		line: callSite.getLineNumber(),
  		begin: new Date
  	}
  }