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Is there a tool that can load a web page and compare the space used (and thus load time) by each file? For example:

An example chart

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"...the space used (and thus load time)" - the space used isn't the only thing that affects load time. – w3dk Aug 4 '10 at 19:23
I was avoiding implying that the reason for such a tool would be to save disk space. – Gelatin Aug 5 '10 at 0:26
up vote 11 down vote accepted

Try Firebug, a plugin for Firefox. You may also find YSlow useful.

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The developer tools in Chrome offer similar functionality as well. – Tim Post Aug 4 '10 at 11:17
+1 for Yslow there is alos a google app like YSlow code.google.com/speed/page-speed – Sruly Aug 4 '10 at 12:43

Safari browser's Web Inspector (accessible from the Develop menu) has a tab called Resources. In that you can find the list of resources shown in a graph by download time & file size.

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I use this often. Try it.

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For simplicity, i like View Dependencies, a Firefox extension. Not graphical, but a nice list, just a right-click away. I find Firebug a bit too heavy for what i need to do, and View Dependencies is light.

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Download the Google Page Speed add-on for Firebug.

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I use Fiddler (http://www.fiddler2.com) to inspect HTTP traffic, both to inspect real document sizes, but also to diagnose other network issues.

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I think Pingdom Tools is right up your alley, though it doesn't show that nifty pie chart.

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