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This is a sub-selection from I don't get it....


DataRiker
Premium
join:2002-05-19
00000
reply to rebus9

Re: I don't get it....

I mentioned the encoding/decoding advantage, but its about ~1ms or 2ms.

Insignificant really.


rebus9

join:2002-03-26
Tampa Bay
Reviews:
·Verizon FiOS
·Bright House

I have both HFC and FIOS, and the difference is a solid 8-10ms.

This is quite easy to test. I have servers colocated in Tampa, in a facility who has 5 transit carriers-- one of them being Brighthouse. The colo is located in 400 N Tampa St, which is also where one of Brighthouse's downtown POPs is located. To make it even better, the BHN-owned router that terminates the fiber into this facility is (literally) 6 cabinets down the row from our cabinet. My pings across BHN Road Runner to these servers homed on BHN Enterprise Fiber, are 14-16ms.

I'm familiar with the fiber path between our part of the county into Hillsborough county. I can't tell you street by street, but I do know the general path, and which areas of the city it crosses before reaching downtown Tampa. It's reasonably direct, with some obvious twists and turns as would be any metro-regional path.

Next up is FIOS. We have offices connected via FIOS, which are even further away-- on the order of 20+ miles further. Ping times across FIOS, to these other hosts on FIOS, are in the 6-8ms range.

Now, let's forget hosts for a moment and talk routers. Ping times across a Brighthouse Road Runner connection to Brighthouse routers known to be in Tampa are on the order of 12-14ms. Ping times to Verizon routers known also to be in Tampa, are 4-6ms.

No matter how you approach it, across approximately the SAME physical path distance, the HFC network induces approximately 8-10ms of additional latency.



DataRiker
Premium
join:2002-05-19
00000

4 edits

There is no possible way that 2 different ISP's used the same route and equipment to a remote location.

The extra latency over copper is due to the encoding used to mitigate line noise and such.

On Fast path DSL you wont lag more than about 1.5ms or so given an equal fiber run.


rebus9

join:2002-03-26
Tampa Bay
Reviews:
·Verizon FiOS
·Bright House

said by DataRiker:

There is no possible way that 2 different ISP's used the same route and equipment to a remote location.

You clearly didn't read the post. I never said they used the same routes.

What I DID say is the physical paths are of comparable distance.


DataRiker
Premium
join:2002-05-19
00000

3 edits

To compare latency you would have to take the same route on comparable equipment.

The vast majority of the lag you see is certainly in either the Route or an overloaded or old piece of equipment (Router, CMTS, whatever...)


BiggA

join:2005-11-23
EARTH
reply to rebus9

Those are insanely low. However, 10ms difference in latency is absolutely nothing, even to the more hardcore gamer.