Some of you may be aware of my occasional whinges in TTTS about the tbb Flash-based speedtester only returning ~12Mbps download instead of the ~65Mbps I get with other Flash speedtesters (eg speedtest.net) and Java-based testers.
I discovered something by accident... ignoring all the blind alleys I went down, if I wait until the download starts then use the mouse or trackpad to scroll the browser window up and down as fast as I can then I can see the "meter" go towards full scale and I get results approaching reasonable. The faster I can scroll it the faster the speedtest gets! It's only if I leave the display stationary that I get rubbish results.
This happens with both IPv4 and IPv6 tests, on the iMac (2560 x 1440, 32-bit colour) and the MacBook (1280 x 800, 32-bit colour), both with default drivers/profiles, both my usual browsers (Opera and Safari) and whether I've got any other applications running or not. OS is Snow Leopard, all updates applied, Flash is latest version.
I've looked at everything related to video and Flash that I can think of, but there's not much you can adjust on a Mac.
Anybody got any ideas, because I'm comprehensively baffled
Flash speedtest is here
, for anyone who doesn't know it.