Google analytics analytics.js giving average page load time as zero - universal-analytics

Question

I have been trying to use analytics.js to track my average page load time under Behaviour --> Site Speed --> Page Timings. I am using (as already mentioned) analytics.js i.e Universal Analytics instead of ga.js i.e Classic Analytics since that is what is recommended in the documentations. I am tracking it for my localhost application
My issue is that the average page load time is not being reflected at all, although 'pageview' is reflected properly. It shows a zero for all pages across the application.
This is the script that I included for the analytics
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-XXXXXX-Y', {'cookieDomain': 'none', 'siteSpeedSampleRate': 100}); //cookie domain is none since I am testing in localhost -- siteSpeedSampleRate set to 100 is the code I included for tracking page load time
ga('send', 'pageview');
ga('send', { //Code to send UserTiming
'hitType': 'event',
'timingCategory': 'category',
'timingVar': 'lookup',
'timingValue': '123',
'timingLabel': 'myUserTime'
});
</script>
As mentioned in the comments, cookie domain is none since I am testing in localhost and siteSpeedSampleRate set to 100 is the code I included for tracking page load time as suggested in the documentation. I am also sending the User Timing as suggested in the documentation of analytics.js User Timings
My questions are :
What should I do to get the average page load time of each page. I searched a lot and am not being to get the proper javascript snippet.
I included the user timing javascript snippet a two days later than I included the 'pageview'. So is it like it will take some time to get reflected in the analytics dashboard? If so, how much time.
Please help me get a clearer idea. Thanks in advance.!

Answer 1

This answer here helped me solve my problem. I just reemoved the cookieDomain here and changed the line to this
ga('create', 'UA-XXXXXX-Y', {'siteSpeedSampleRate': 100});