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How can I test the speed of a web page?

How can I further diagnose a page so that I can see which elements in the page take longer to load?

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closed as off topic by ChrisF, Jared Harley, random Sep 9 '10 at 2:23

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This would be better asked on – ChrisF Sep 8 '10 at 21:10
up vote 4 down vote accepted

FireBug and Page Speed

It is an open-source Firefox/Firebug Add-on. Webmasters and web developers can use Page Speed to evaluate the performance of their web pages and to get suggestions on how to improve them.

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How can I test the speed of a web page?

This site offers a online tool to find your web-page loading speed

Other online tools include:

Also Page Speed is an excellent Firefox/Firebug Add-on

Some tips in reducing loading speed could be :

  • Remove unwanted Things like background sound, big animation files, unwanted java-script codes

  • Try to use more CSS

  • Avoid use of Nested Tables
  • Use GIF instead of JPEG . Try to use image files that take low disk space.
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Google Chrome has some very detailed metrics for the request/response, downloading of the content, parsing, presentation, etc.

Right Click on a page and "Inspect Element". They also have a huge number of development tools tucked away behind that menu item.

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If by "which elements" you mean which HTTP requested objects, then client-side tools like Firebug's "net" tab (see here) will help for simple cases and many less than simple ones.

If you are needing to diagnose elements within a scripted page then that will depend greatly on what language/framework/servers you are using.

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I use this tool 24x7:

And the free tests at:

Here's examples of the response time test and multibrowser tests:

I also use the built in features in chrome, but since I'm on a netbook in a country far far away from my server, there's too much going on to do reliable tests.

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AlertFox has a very easy to use test for global page load times:

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