Great review, Sebastian!


> NETFLIX: fast.com.
>         Pros: allows selection of upload testing, supposedly decent
> back-end, duration configurable
>                 allows unloaded, loaded download and loaded upload RTT
> measurements (but reports sinlge numbers for loaded and unloaded RTT, that
> are not the max)
>         Cons: RTT report as two numbers one for the loaded and one for
> unloaded RTT, time-course of RTTs missing
>         BUFFERBLOAT verdict: incomplete, but oh, so close...

Just a note that I have a plan to separate the loaded latency into
upload/download. It's not great UX now they way it's implemented.
The timeline view is a bit more nuanced, in the spirit of the simplistic
UX, but I've been thinking on a good way to show that for super users as
well.
Two latency numbers - that's more user friendly, we want the general user
to understand the meaning. And latency under load is much easier than
bufferbloat.

As a side note, if our backend is decent, I'm curious what are the backends
for the speed tests that exist that are great :)


SERGEY FEDOROV

Director of Engineering

sfedorov@netflix.com

121 Albright Way | Los Gatos, CA 95032



On Fri, May 1, 2020 at 12:48 PM Sebastian Moeller <moeller0@gmx.de> wrote:

> Hi Dave,
>
> well, it was a free service and it lasted a long time. I want to raise a
> toast to Justin and convey my sincere thanks for years of investing into
> the "good" of the internet.
>
> Now, the question is which test is going to be the rightful successor?
>
> Short of running netperf/irtt/iper2/iperf3 on a hosted server, I see lots
> of potential but none of the tests are really there yet (grievances in now
> particular order):
>
> OOKLA: speedtest.net.
>         Pros: ubiquitious, allows selection of single flow versus
> multi-flow test, allows server selection
>         Cons: only IPv4, only static unloaded RTT measurement, no control
> over measurement duration
>         BUFFERBLOAT verdict: incomplete, maybe usable as load generator
>
>
> NETFLIX: fast.com.
>         Pros: allows selection of upload testing, supposedly decent
> back-end, duration configurable
>                 allows unloaded, loaded download and loaded upload RTT
> measurements (but reports sinlge numbers for loaded and unloaded RTT, that
> are not the max)
>         Cons: RTT report as two numbers one for the loaded and one for
> unloaded RTT, time-course of RTTs missing
>         BUFFERBLOAT verdict: incomplete, but oh, so close...
>
>
> NPERF: nperf.com
>         Pros: allows server selection, RTT measurement and report as time
> course, also reports average rates and static RTT/jitter for Up- and
> Download
>         Cons: RTT measurement for unloaded only, reported RTT static only
> , no control over measurement duration
>         BUFFERBLOAT verdict: incomplete,
>
>
> THINKBROADBAND: www.thinkbroadband.com/speedtest
>         Pros: IPv6, reports coarse RTT time courses for all three
> measurement phases
>         Cons: only static unloaded RTT report in final results, time
> courses only visible immediately after testing, no control over measurement
> duration
>         BUFFERBLOAT verdict: a bit coarse, might work for users within a
> reasonable distance to the UK for acute de-bloating sessions (history
> reporting is bad though)
>
>
> honorable mentioning:
>         BREITBANDMESSUNG: breitbandmessung.de
>         Pros: query of contracted internet access speed before
> measurement, with a scheduler that will only start a test when the backend
> has sufficient capacity to saturate the user-supplied contracted rates,
> IPv6 (happy-eyeballs)
>         Cons: only static unloaded RTT measurement, no control over
> measurement duration
>         BUFFERBLOAT verdict: unsuitable, exceot as load generator, but the
> bandwidth reservation feature is quite nice.
>
> Best Regards
>         Sebastian
>
>
> > On May 1, 2020, at 18:44, Dave Taht <dave.taht@gmail.com> wrote:
> >
> >
> https://www.reddit.com/r/HomeNetworking/comments/gbd6g0/dsl_reports_speed_test_no_longer_free/
> >
> > They ran out of bandwidth.
> >
> > Message to users here:
> >
> > http://www.dslreports.com/speedtest
> >
> >
> > --
> > Make Music, Not War
> >
> > Dave Täht
> > CTO, TekLibre, LLC
> > http://www.teklibre.com
> > Tel: 1-831-435-0729
> > _______________________________________________
> > Cake mailing list
> > Cake@lists.bufferbloat.net
> > https://lists.bufferbloat.net/listinfo/cake
>
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