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Last update 10 December 2011 The new profiling system introduced during 2011 apparently adjusts immediately to the connection speed, setting it to about 88% of that. This is a great improvement, as the apparent loss of speed is illusory, in that it covers most of the overheads associated with TCP/IP. The older version grouped speeds into wide bands, so that people near the bottom of the band were all right, but those near the top of a band lost all the speed between the bottom and their connection as well as getting the profile loss applied at the bottom. At least one ISP, Plusnet), of those that hold internal copies, as explained on the Old BT Wholesale page, has not yet amended their system to cope properly with the new method and things can get out of step. So if your throughput speed is consistently below the IP Profile shown by the BT Performance Tester then ask them if this is occurring. |
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