I got my Roku 3 about a week ago and so far I'm loving it. I do have a few questions though, which are more due to my lack of knowledge about streaming than any particular issue with the player itself.
The Roku is hard-wired through an ethernet switch, but the cable runs are very short. I have Comcast and routinely get download speeds of just over 30 Mbps on my PC on speedtest.net. I notice that the speeds recorded on the speedtest channel for the Roku are always roughly half that of the readings on my PC checked just before or after. After doing some searching here and on Google and the Roku forum, I still don't understand why that is. I thought it might have been due to running through the switch, but if I connect directly to the router there is no difference. No other streaming devices are running on my network when I test.
When I run the Short 23.976 on Netflix during the week, regardless of time of day, I get a quick ramp to 3250 kbps and the reading remains there. However, on weekends, the reading ramps only to 750 kbps and bounces around between there and 1050 and 1750. Is the difference between weekday and weekend rates likely due to Netflix traffic? My speedtest.net weekday/weekend readings don't seem to vary appreciably on either my PC or the Roku channel.
I did change the DNS settings in my router from Comcast's default to Open DNS. I thought that had improved the bitrates I was getting to the Roku, but now I realize that improvement may simply have been due to the weekend/weekday discrepancy. I considered re-configuring QOS in my router from default, but that looks like more than I want to tackle unless I'm pretty sure this will be worthwhile.
In short, I guess I'm wondering if this is "just the way it is" or if there is something I can do to improve my setup.