I can't run the test exmaple with protractor-perf

I'm trying to run the example from the readme file:

var ProtractorPerf = require('protractor-perf');
describe('angularjs homepage todo list', function () {
    var perf = new ProtractorPerf(protractor, browser); // Initialize the perf runner
    it('should add a todo', function () {
        browser.get('http://ift.tt/Q0foJK');

        perf.start(); // Start measuring the metrics
        element(by.model('todoText')).sendKeys('write a protractor test');
        element(by.css('[value="add"]')).click();
        perf.stop(); // Stop measuring the metrics 

        if (perf.isEnabled) { // Is perf measuring enabled ?
            // Check for perf regressions, just like you check for functional regressions
            expect(perf.getStats('meanFrameTime')).toBeLessThan(60);
        };

        var todoList = element.all(by.repeater('todo in todos'));
        expect(todoList.count()).toEqual(3);
    });
});

I'm using the protractor-pre instead of protractor, and what I see after:

angularjs homepage todo list
  x should add a todo <36>
    TypeError: undefined is not a function

What is problem with my configuration? or what is that?