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askheaves 
Ack!!!
Group: Members
Posts: 1955
Joined: Sep. 2000
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Posted on: Mar. 28 2001,20:43 |
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Compression, bad math, buffering. Could be anything.My guess is that you see this speed for a short time at the beginning of a download, then it stabalizes somewhere normal. Probably what's happening is that Windows is buffering a bunch of serial data, processing it in bursts, and buffering it again in the TCP stack, then buffering it again in IE or Nutscrape. So, the calculations are probably done up in IE, and they're done on an choppy data stream and averaged, and there is a small amount of data already that has transported before the averaging takes place. Or, you have a magic modem and I want it. Better not go down any dark alleys with that modem of yours.
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Spydir Web
FNG
Group: Members
Posts: 13
Joined: Apr. 2001
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Posted on: Mar. 29 2001,00:16 |
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It's not a Windows thing, cuz, well... don't run windows on this box. I've watched it reach the high speeds on multiple occations in about 5 different apps (gkrellm, modem lights (gnome applet), netscape status bar, and a 'cat /proc/net/dev' command). Normally it's not when I'm downloading some large like a MP3 or file, it's more when I'm downloading something like a flash thing or large images (btw - I hate people who use those huge image maps for navbars...). Like I said, it's only for less then a minute, and it doesn't happen that much, like once a connection (damned ISP kicks me after 12 hours, exact).I dunno, it could have something to do with bad math on /proc/net/dev's side or some heavy compression between my ISP and me (I didn't think my ISP supported it, but I built it into my kernel anyway)... who knows... oh yeah, I'll sell it to you for about ũ,500 per month and about how ever much it costs for a T1 line setup...  ------------------
Spydir Web - http://netsyndrome.net/spydirweb/
Net Syndrome - http://www.netsyndrome.net/ Sometimes you're the dog, sometimes you're the hydrant...
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damien_s_lucifer
Emperor of Detnet
Group: Members
Posts: 33
Joined: Jan. 1970
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Posted on: Mar. 29 2001,00:55 |
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It's almost definately buffering. What happens when you download is :1. A connection to the server is opened. 2. Your client requests the file. 3. The server returns either an error code, or an "OK" status code - and immediately starts sending data. 4. Once the client gets the "OK" code, it prompts you for a filename. Meanwhile, the server continues to send data, which is buffered into a temp file until you give the client a filename and click OK (or whatever the equivalent action is on your system). 5. The download dialog pops up, and speed calculations are made by dividing the # of bytes received by the # of seconds the download has occurred. Because most clients don't start timing their download until you click "OK," the "# of seconds we've been downloading" number is usually a few seconds short. In the end, this will average out, but in the begginning you'll get a transfer rate that appears to be a lot higher than normal. But it's just an illusion caused by buffering. The same thing happens on my machine - my DSL line is only capable of sustaining about 40K / second, but IE often reports upwards of 150K / second initially. By the end of the download it's back to 40K / second 
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CatKnight
Jedi Republican
Group: Members
Posts: 3807
Joined: Dec. 2000
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Posted on: Mar. 29 2001,01:15 |
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also could be text compression. you can download text much faster then compressed data like jpg's or exe's. if you are loading pages or files that are mostly text they could go that fast consistantly.
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solid
Kiloposter
Group: Members
Posts: 1232
Joined: Dec. 2000
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Posted on: Mar. 29 2001,01:58 |
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Exactly what askheaves mentioned. I get the very frequently too. I once even hit a T1 speed about 3 years ago. And a few months ago I pre-buffered a lot and got a steady 20k/sec getting ICQ files from my friend.
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askheaves
Ack!!!
Group: Members
Posts: 1955
Joined: Sep. 2000
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Posted on: Mar. 29 2001,05:28 |
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I want to install Sprint Broadband access (Wireless dish, 5Mbit/s, ุ bucks) where installation involves 3 bolt holes in the roof (which can be circumvented) and a coax cable. My apartment manager won't allow it. However, if it were available up here in the mountains, they'd let me do DSL or cable... possibly much more invasive. Damnit, I have to work this out. I'm dialing up a server at work right now which has a crappy connection to the Net to begin with, muchless the filtering software and firewall. No HL, no pr0n, no nothing. AOL barely works.
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