I am comparing a http download with a download with
curl. On right-clicking the hyperlink (via a web
browser) for a file and then saving it on local drive,
it takes 10 seconds. The same via curl is taking like
25 seconds or more (save it locally via the -o
option). Is it fair to compare these two downloads for
speed in this way ?

found the below from the archives while searching
about difference in downloading speeds.
-------------------------------------------------------
Re: Download performance
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From: Jacky Lam <sylam_at_emsoftltd.com>
Date: 2002-04-02

On Wednesday 27 March 2002 17:08, Daniel Stenberg
wrote:
> On Wed, 27 Mar 2002, Jacky Lam wrote:
> > > I don't have any answers to why this happens.
Before we continue on
> > > this, can you please post more detailed and
specific, both test results
> > > and details on how your tests have been
performed?
> >
> > The program I am developing is a web browser. I
just mark the
> > performance by downloading a page serveral times
and taking the average.
> > With other parts of browser remains the same,
downloading a local(HK)
> > page requires 14s for libcurl version, but 30s for
libwww version.
> > However, for www.cnn.com, the result is just
reversed. Libwww seems
> > downloading much faster.
>
> You mean the entire CNN front page, including all
the images etc? Can that
> be because of A) your lack of persistency due to the
cleanup/init all the
> time and perhaps B) libcurl does not offer
pipelining.
>
> I would say that A is a likely reason, while B
wouldn't make such a huge
> difference.
>

        After rewriting the code to make use of
persistent connection (and fix a bug
in the job scheduling between download agents), the
download speed of our
browser is comparable to opera, netscape. So, LibCurl
doesn't have any
performance problem. In fact, faster than
single-threaded libwww. Thx.

Jacky
Received on Thu Apr 4 02:14:44 2002

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Received on 2005-12-21