Speedtester - upstream

I cannot get to the bottom of a problem with the upstream tests in te TBB speedtester.

My line operates at 59.xx down and 18.xx to 19 upstream but running te TBB speedtester gives a very slow rise - maybe 5 or 6 seconds before it records speeds of 17Mbps second or above.

A couple of tests:

http://www.thinkbroadband.com/speedtest/results.html...

http://www.thinkbroadband.com/speedtest/results.html...


Downstream is fine up to speed instantaneously, but look at the upstream. I have seen this on other users results too.


Any thoughts as to why.

In reply to a post by MHC:

Any thoughts as to why.

Do you use any adblockers or similar? I used to use one called Admuncher and that halved my upstream:

http://forum.admuncher.com/viewtopic.php?t=719

I assume the same problem could occur with anything that hooks into the network stack to monitor HTTP traffic.

And people are blissfully unaware on most speed testers due to algorithm controlling the needle and not showing the graph afterwards.

I have Ghostery installed in FF but the results are the same whether it is running or not. AV on/off does not matter. Using IE which has no blocking gives similar results.

Once the upstream gets to 18.xx it stays there so I know the line is fully capable - there is still spare SNR on the upstream with an achievable of around 24Mbps

How does http://labs.thinkbroadband.com/ispa fare?

Different - still the lag, and then a nice sawtooth with 19.1 Average and 23-24 Burst!

AV Off; Ghostery On
http://www.thinkbroadband.com/speedtest/results.html...

AV Off; Ghostery Off
http://www.thinkbroadband.com/speedtest/results.html...
http://www.thinkbroadband.com/speedtest/results.html...


If I do a large upload to somewhere like Photobucket and monitor in Task Manager, I will see it sit at 18-19Mbps for minutes - little ups and down from congestion &c but basically a continuous rate.

Andrew,

I too have been getting some weird results on the standard upstream tester with it consistently showing lower speeds than i'm obtaining (usually by about 4meg)
The downstream is pretty accurate and comparable to other tests I've run.

I just ran your new tests above and got the following:

New test

Old Test

Ookla

But it's close enough for government work
Just thought I post my 2p worth for you.

Chris

Similar to mine - lag in the upstream starting on the standard test and the saw tooth on the ISPA test.

Have tried the test in IE8.

It takes about 1 second to run, no data downloaded - stays on the start screen and in the info bar at the bottom of IE8 it says: "Done, but with errors on page."

Sawtooth is fairly normal.

Different browsers can affect that, I could smooth it out, but then you'd not see what was happening