Comparing Fiddler to Firebug and Chrome dev tools

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Ildhund

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Aug 24, 2009, 4:45:17 AM8/24/09
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In an effort to pinpoint performance bottlenecks in Adobe's new web
forums, mods have asked users to submit traffic reports. This post
http://forums.adobe.com/thread/481223?tstart=0
is their appeal.

The last paragraph made me wonder whether it's true that Fiddler
cannot produce the sort of data that Firebug and the other tools
mentioned do, or whether it's just a question of configuring Fiddler
to produce analagous data. Can anyone enlighten me?

I use IE7 exclusively, on XPSP3.

Noel

EricLaw

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Aug 24, 2009, 2:53:52 PM8/24/09
to Fiddler
Fiddler can easily collect all network-related performance
information, akin to what you'd get from Firebug.

From its perch in the networking stack, Fiddler cannot observe
JavaScript execution times and other client-only information; you
should use the IE8 Developer Tools profiler for that purpose.

-Eric

On Aug 24, 1:45 am, Ildhund <jnllburg...@gmail.com> wrote:
> In an effort to pinpoint performance bottlenecks in Adobe's new web
> forums, mods have asked users to submit traffic reports. This posthttp://forums.adobe.com/thread/481223?tstart=0

Ildhund

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Aug 25, 2009, 4:30:12 AM8/25/09
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Thank you, Eric. I asked whether a Fiddler trace would do:

>> With reference to your request for performance data [...], what is it you need for IE that Fiddler can't produce?

and the answer I got:

> Most likely it has most of what we need (not everything we want though, since it is a proxy it won't record DNS requests or DOM events). I just haven't tested import / export features or an actual analysis of a real trace yet.

I'll think a bit longer about installing the dev tools...
--
Noel
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>
> - Show quoted text -

EricLaw

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Aug 25, 2009, 11:35:46 AM8/25/09
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Fiddler records DNS timings; they're in the default export file. You
can see them on the "Statistics" tab when you select a single session;
it will say something like "DNS Lookup: 16ms."

IE8 has the dev tools installed by default, just hit F12.

Fiddler can't record DOM Events, but as far as I know, neither can
Firebug.

-Eric
> > - Show quoted text -- Hide quoted text -

Ildhund

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Aug 25, 2009, 6:47:40 PM8/25/09
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Thanks very much. I'll pass this on - another set of myths debunked.

I haven't installed IE8 yet; I have IE6 on my system drive and IE7 on
another one where my progam files are. I'm trying to find a way to
force IE8 to install on the system drive, but MS tell me it will only
install in %programfiles% and there's nothing I can do to change
that.

Noel
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