Jump to content


 


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.


Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.

Photo

Download Transfer Rate Starts At 2000kb Then Drops To Average 300kb


  • Please log in to reply
12 replies to this topic

#1 david28

david28

    Forum Member


  • Banned
  • 1,614 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:02:18 AM

Posted 07 March 2008 - 10:04 PM

Hi everyone,

I have noticed that whenever I download something, for the first 2 seconds, the transfer rate is at around 2,000kbps then it drops down to what it normally is, 300kbps. Why does it do this? Do I need to configure something to maintain it at that speed?

Any help will be greatly appreciated! :thumbsup:

Regards,
David.

BC AdBot (Login to Remove)

 


m

#2 Billy O'Neal

Billy O'Neal

    Visual C++ STL Maintainer


  • Malware Response Team
  • 12,301 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Redmond, Washington
  • Local time:09:48 AM

Posted 07 March 2008 - 10:15 PM

Nope. That issue is caused by how modern web browsers calculate the xfer speed.
When you start a download, your browser starts a timer based the first packet it receives, and it updates every half second or so, like this

totalBytesTransfered/totalSeconds /1024 = KB/Sec.

Because of the every half second reporting, the first packet is received as one whole piece very fast, because the time to transfer the first piece is limited by the speed of your lan, not the speed of the internet.
This makes the connection "look" like 2000KB/sec, when it is really that the packet was cached by the router/switch on your lan.

After the first packet, however, the distance between packets starts to add to that total time, even though each packet can be sent at lightning speed. So the final result you have is the speed of your connection.

Billy3
Twitter - My statements do not establish the official position of Microsoft Corporation, and are my own personal opinion. (But you already knew that, right?)
Posted Image

#3 david28

david28

    Forum Member

  • Topic Starter

  • Banned
  • 1,614 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:02:18 AM

Posted 07 March 2008 - 10:30 PM

Ok thanks, I didn't think it was my PC.

But, I downloaded a 2Mb file in one second.

#4 Billy O'Neal

Billy O'Neal

    Visual C++ STL Maintainer


  • Malware Response Team
  • 12,301 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Redmond, Washington
  • Local time:09:48 AM

Posted 07 March 2008 - 10:33 PM

Was it a file you have ever downloaded in the past?

Also, your ISP may cache files for you.

In addition, if you are on a cable line, everyone in your neighborhood shares the same pipe. Therefore, your speeds will be high in off peak hours.

Billy3
Twitter - My statements do not establish the official position of Microsoft Corporation, and are my own personal opinion. (But you already knew that, right?)
Posted Image

#5 david28

david28

    Forum Member

  • Topic Starter

  • Banned
  • 1,614 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:02:18 AM

Posted 07 March 2008 - 10:38 PM

Thanks for the quick reply! :thumbsup:

I have never downloaded the file before.

Yes, I have noticed in off-peak time it does go a little bit faster.

The thing is, it does it for almost any download.

Regards,
David.

#6 Billy O'Neal

Billy O'Neal

    Visual C++ STL Maintainer


  • Malware Response Team
  • 12,301 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Redmond, Washington
  • Local time:09:48 AM

Posted 07 March 2008 - 10:50 PM

Hmmmmmm thats odd. You have me curious now. What browser are you using?

Billy3
Twitter - My statements do not establish the official position of Microsoft Corporation, and are my own personal opinion. (But you already knew that, right?)
Posted Image

#7 david28

david28

    Forum Member

  • Topic Starter

  • Banned
  • 1,614 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:02:18 AM

Posted 08 March 2008 - 12:29 AM

Mozilla Firefox. :thumbsup:

Regards,
David.

#8 Billy O'Neal

Billy O'Neal

    Visual C++ STL Maintainer


  • Malware Response Team
  • 12,301 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Redmond, Washington
  • Local time:09:48 AM

Posted 08 March 2008 - 12:33 AM

Yep. my guess is something to do with your router or your ISP.

Use DownThemAll! by any chance?

There is (maybe was by now) a funny bug in DownThemAll! that would skyrocket the xfer rate if you resized the window.

Oh well. Have a nice night,
Billy3
Twitter - My statements do not establish the official position of Microsoft Corporation, and are my own personal opinion. (But you already knew that, right?)
Posted Image

#9 david28

david28

    Forum Member

  • Topic Starter

  • Banned
  • 1,614 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:02:18 AM

Posted 08 March 2008 - 12:44 AM

Sorry, what is DownThemAll?

I'm a little confused :thumbsup:

Regards,
David.

#10 david28

david28

    Forum Member

  • Topic Starter

  • Banned
  • 1,614 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:02:18 AM

Posted 08 March 2008 - 12:47 AM

Oh never mind I found out! :flowers:

It is a download accelerator and a download manager.

Personally, when it says download accelerator, I always know it isn't true! :thumbsup:

I'll give it a try and see if it works!

Regards,
David.

#11 Billy O'Neal

Billy O'Neal

    Visual C++ STL Maintainer


  • Malware Response Team
  • 12,301 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Redmond, Washington
  • Local time:09:48 AM

Posted 08 March 2008 - 12:53 AM

No, thats not the neat thing about DownThemAll!. The neat thing is, you can go to a page, and tell downthemall: Download every MP3 which this page links to. Or FLV. Or JPEG. Or anything you can think of writing a mask for.

Depending on the type of file, it does speed things up quite a bit. But it's more server dependant than anything else.

http://www.downthemall.net/howto/features/

Heres what some others have to say about it: http://www.downthemall.net/development/blo...dta/press-says/

Well, good luck with dTa. Im ending my conversation here, because we kinda strayed from the original topic, no?

If you have questions about dTa, we should start a seperate topic.

Have a nice night,
Billy3
Twitter - My statements do not establish the official position of Microsoft Corporation, and are my own personal opinion. (But you already knew that, right?)
Posted Image

#12 david28

david28

    Forum Member

  • Topic Starter

  • Banned
  • 1,614 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:02:18 AM

Posted 08 March 2008 - 01:02 AM

Only strayed a little bit, but it helped me a bit with the problem :thumbsup:

Thanks for that info Billy O'Neal

Regards,
David.

#13 david28

david28

    Forum Member

  • Topic Starter

  • Banned
  • 1,614 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:02:18 AM

Posted 08 March 2008 - 04:39 PM

I'll test DownThemAll and report back if this helps :thumbsup:

Regards,
David.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users