ISP speed
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From: E Z Peaces on 7 Jan 2010 02:25 Paul Fuchs wrote: > I am out in the boonies of Costa Rica. I managed to get internet via > tower broadcast. It is not very good but the only store in town. There > are no telephone lines where I live. Most people use cell phones. > > Anyway, my question is about the ISP speed. My provider uses > speedtest.net to test the speed it is providing because it is > international iand is testing me, In theory, from a ISP in Costa Rica, > less than 50 miles away. > > So my question is this. My last test gave me: > ping: 254 ms > download: 0.57 Mb/s > upload: 0.20 Mb/s > > When I download a file from a USA site in Safari, I am getting speeds > against this reading of about 25 kBytes per sec. Now, by the rule of 8, > that works out to about 0.20kbps. So what's wrong with this picture? > I don't know if it's related, but the other day I tried BitTorrent to download NeoOffice. The file came in at a much slower speed than the network traffic shown in Activity Monitor. I've also heard that files download more slowly if you use a proxy server.
From: Paul Fuchs on 7 Jan 2010 10:25 Ian Gregory <foo(a)prdetfanaaeextna.invalid> wrote: > How consistent is the 25 kBytes per sec figure? How often have you > measured it and was it at varying times of day etc? It will vary. Lately it will not go over 40 and falls down into the teens quite often. But 25 is a typical average. It tends to be slower in the evening, presumably because higher usage is clogging the system. Speedtest also gives me a ping number, and this varies tremendously. I have seen it run from 40 ms to 1300ms. The Safari page load speeds seem to be more related to the ping speed than variations in the download speed. This morning the system seemed quite spiffy, and when I checked it, the download was typical but the ping was 51, which is about as fast as it gets. I also suspect that the slow upload speeds slow the system a lot because it has to wait longer for the error checking. Typical download is 500 kbps and upload 100. Could this be a major reason why the file download speed, even using the rule of ten, seems a lot slower than the speedtest download? The rule of ten should give me at least 50 kBytes/s and I never get close to this. -- During times of universal deceit, telling the truth becomes a revolutionary act. George Orwell
From: Kevin McMurtrie on 8 Jan 2010 00:01 In article <1jbwny6.1v1acrl1rbxra7N%pf(a)porkain'tkosher.oink>, pf(a)porkain'tkosher.oink (Paul Fuchs) wrote: > I am out in the boonies of Costa Rica. I managed to get internet via > tower broadcast. It is not very good but the only store in town. There > are no telephone lines where I live. Most people use cell phones. > > Anyway, my question is about the ISP speed. My provider uses > speedtest.net to test the speed it is providing because it is > international iand is testing me, In theory, from a ISP in Costa Rica, > less than 50 miles away. > > So my question is this. My last test gave me: > ping: 254 ms > download: 0.57 Mb/s > upload: 0.20 Mb/s > > When I download a file from a USA site in Safari, I am getting speeds > against this reading of about 25 kBytes per sec. Now, by the rule of 8, > that works out to about 0.20kbps. So what's wrong with this picture? It could be that you're suffering from packet loss due to malfunctioning equipment or heavily loaded networks sending traffic to you in bursts. Try pinging a site as you're downloading. For Mac OS 10.5 and earlier, packet loss has an extremely high performance penalty on high latency connections. Every lost packet causes the stream in progress to be discarded, repositioned, and then resumed. That takes a while when there's 1/4 second of lag. Mac OS 10.6 finally implements "Selective ACKs" which allows lost packets to be resent without interrupting the stream in progress. -- I won't see Google Groups replies because I must filter them as spam
From: Jean-Michel LEON-FOUN-LIN on 10 Jan 2010 11:31 On 2010-01-07 02:28:01 +0400, Paul Fuchs said: > When I download a file from a USA site in Safari, I am getting speeds > against this reading of about 25 kBytes per sec. Now, by the rule of 8, > that works out to about 0.20kbps. So what's wrong with this picture? Is it not 0.2 MEGA bits per second (not 0.2 KILO bits per sec.)?
From: Paul Fuchs on 11 Jan 2010 08:20
Jean-Michel LEON-FOUN-LIN <jmlfl(a)earth.solarsystem.galaxy.univ> wrote: > On 2010-01-07 02:28:01 +0400, Paul Fuchs said: > > > When I download a file from a USA site in Safari, I am getting speeds > > against this reading of about 25 kBytes per sec. Now, by the rule of 8, > > that works out to about 0.20kbps. So what's wrong with this picture? > > Is it not 0.2 MEGA bits per second (not 0.2 KILO bits per sec.)? Yes, it should have read 0.2 Mbps. I didn't correct it with a follow post, because the error was obvious from the other information. -- During times of universal deceit, telling the truth becomes a revolutionary act. George Orwell |