[Bloat] DSLReports Speed Test has latency measurement built-in

David Lang david at lang.hm
Sun Apr 19 03:36:13 EDT 2015

As a start, the ping time during the test that shows up in the results page is 
good, but you should show that on the main screen, not just in the results+share 

it looked like the main test was showing when the upload was stalled, (white 
under the line instead of color), but this didn't show up in the report tab.

I also think that the retransmit stats are probably worth watching and doing 
something with. You are trying to drive the line to full capacity, so some 
drops/retransmts are expected. How many re expected vs how many are showing up?

http://www.dslreports.com/speedtest/320230 (and now you see my pathetic link)

David Lang

On Sun, 19 Apr 2015, jb wrote:

> Date: Sun, 19 Apr 2015 15:26:51 +1000
> From: jb <justin at dslr.net>
> To: Dave Taht <dave.taht at gmail.com>, bloat at lists.bufferbloat.net
> Subject: Re: [Bloat] DSLReports Speed Test has latency measurement built-in
> The graph below the upload and download is what is new.
> (unfortunately you do have to be logged into the site to see this)
> it shows the latency during the upload and download, color coded. (see
> attached image).
> In your case during the upload it spiked to ~200ms from ~50ms but it was
> not so bad. During upload, there were no issues with latency.
> I don't want to force anyone to sign up, just was making sure not to
> confuse anonymous users with more information than they knew what to do
> with. When I'm clear how to present the information, I'll make it available
> by default, to anyone member or otherwise.
> Also, regarding your download, it stalled out completely for 5 seconds..
> Hence the low conclusion as to your actual speed. It picked up to full
> speed again at the end. It basically went
> 40 .. 40 .. 40 .. 40 .. 8 .. 8 .. 8 .. 40 .. 40 .. 40
> which explains why the Latency measurements in blue are not all high.
> A TCP stall? you may want to re-run or re-run with Chrome or Safari to see
> if it is reproducible. Normally users on your ISP have flat downloads with
> no stalls.
> thanks
> -Justin
>> On Sun, Apr 19, 2015 at 2:01 PM, Dave Taht <dave.taht at gmail.com> wrote:
>>> What I see here is the same old latency, upload, download series, not
>>> latency and bandwidth at the same time.
>>> http://www.dslreports.com/speedtest/319616
>>> On Sat, Apr 18, 2015 at 5:57 PM, Rich Brown <richb.hanover at gmail.com>
>>> wrote:
>>>> Folks,
>>>> I am delighted to pass along the news that Justin has added latency
>>> measurements into the Speed Test at DSLReports.com.
>>>> Go to: https://www.dslreports.com/speedtest and click the button for
>>> your Internet link. This controls the number of simultaneous connections
>>> that get established between your browser and the speedtest server. After
>>> you run the test, click the green "Results + Share" button to see detailed
>>> info. For the moment, you need to be logged in to see the latency results.
>>> There's a "register" link on each page.
>>>> The speed test measures latency using websocket pings: Justin says that
>>> a zero-latency link can give 1000 Hz - faster than a full HTTP ping. I just
>>> ran a test and got 48 msec latency from DSLReports, while ping
>>> gstatic.com gave 38-40 msec, so they're pretty fast.
>>>> You can leave feedback on this page -
>>> http://www.dslreports.com/forum/r29910594-FYI-for-general-feedback-on-the-new-speedtest
>>> - or wait 'til Justin creates a new Bufferbloat topic on the forums.
>>>> Enjoy!
>>>> Rich
>>>> _______________________________________________
>>>> Bloat mailing list
>>>> Bloat at lists.bufferbloat.net
>>>> https://lists.bufferbloat.net/listinfo/bloat
>>> --
>>> Dave Täht
>>> Open Networking needs **Open Source Hardware**
>>> https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67
>>> _______________________________________________
>>> Bloat mailing list
>>> Bloat at lists.bufferbloat.net
>>> https://lists.bufferbloat.net/listinfo/bloat

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