Newsgroups : Microsoft : microsoft.public.inetsdk.programming.wininet : 2007 Mar : InternetReadFile much slower than IE

InternetReadFile much slower than IE

Subject:	InternetReadFile much slower than IE
Posted by:	"meanfox" (codemag..@gmail.com)
Date:	21 Mar 2007 23:15:16

Hi,

When I use IE to download a test file it takes about 3 seconds (non-
cached).
My own WinInet code using InternetReadFile takes about 7 seconds (also
non-cached).

This is repeatable. It is a 644K file. This is on XP SP2 with IE7.

Can anyone explain this and tell me how to speed up my WinInet
download? I thought IE used WinInet?

I have experimented with a few things that made no difference:

* Running synchronously vs running in a thread
* Downloading in 1 call to InternetReadFile vs. downloading many 1K
chunks

Please advise!

Tom

Replies:

Re: InternetReadFile much slower than IE posted by Scherbina Vladimir on Thu, 22 Mar 2007
- Re: InternetReadFile much slower than IE posted by meanfox on 22 Mar 2007
  - Re: InternetReadFile much slower than IE posted by Paul Baker [MVP, Windows - Networking] on Thu, 22 Mar 2007
    - Re: InternetReadFile much slower than IE posted by meanfox on 22 Mar 2007
      - Re: InternetReadFile much slower than IE posted by Paul Baker [MVP, Windows - Networking] on Thu, 22 Mar 2007
        Re: InternetReadFile much slower than IE posted by meanfox on 22 Mar 2007
        Re: InternetReadFile much slower than IE posted by Paul Baker [MVP, Windows - Networking] on Thu, 22 Mar 2007
        Re: InternetReadFile much slower than IE posted by meanfox on 22 Mar 2007
        Re: InternetReadFile much slower than IE posted by Paul Baker [MVP, Windows - Networking] on Fri, 23 Mar 2007
        Re: InternetReadFile much slower than IE posted by meanfox on 23 Mar 2007
        Re: InternetReadFile much slower than IE posted by Paul Baker [MVP, Windows - Networking] on Fri, 23 Mar 2007
        
        Re: InternetReadFile much slower than IE posted by Scherbina Vladimir on Mon, 26 Mar 2007
        Re: InternetReadFile much slower than IE posted by meanfox on 27 Mar 2007
        Re: InternetReadFile much slower than IE posted by Paul Baker [MVP, Windows - Networking] on Wed, 28 Mar 2007
        Re: InternetReadFile much slower than IE posted by Paul Baker [MVP, Windows - Networking] on Wed, 28 Mar 2007
        Re: InternetReadFile much slower than IE posted by meanfox on 31 Mar 2007
        Re: InternetReadFile much slower than IE posted by Paul Baker [MVP, Windows - SDK] on Mon, 2 Apr 2007

InternetReadFile much slower than IE

Glossary

Replies: