Web app to test web page speed

Question

What web service can I use to test the speed of a web page? It would be great if it can further diagnose the page so that I can see which elements in the page take longer to load.

Answer 1

WebPageTest

My personal favorite, it will give detailed report

Result of webapps page test; I'm not sure how long this result will persist...

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Free website speed checker

Is your website fast enough ? Find it out with our free website speed test ! You can even compare your website speed with the sites of your competitors.

It is estimated that if a page doesn't load within 5-8 seconds you will lose 1/3 of your visitors. So if your website speed is slower than that perhaps you should revise your design, site structure or just move to a faster server.

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Web Page Analyzer - 0.98 - from Website Optimization Free Website

Performance Tool and Web Page Speed Analysis

Try our free web site speed test to improve website performance. Enter a URL below to calculate page size, composition, and download time. The script calculates the size of individual elements and sums up each type of web page component. Based on these page characteristics the script then offers advice on how to improve page load time. The script incorporates the latest best practices from Website Optimization Secrets, web page size guidelines and trends, and web site optimization techniques into its recommendations.

Answer 2

https://developers.google.com/pagespeed/#

Google Developers Page Speed Online is very useful to analyze the performance of your pages.

Page Speed Online analyzes the content of a web page, then generates suggestions to make that page faster. Reducing page load times can reduce bounce rates and increase conversion rates.

http://code.google.com/speed/pss/ Page Speed Service is an online service to automatically speed up loading of your web pages. Page Speed Service fetches content from your servers, rewrites your pages by applying web performance best practices and serves them to end users via Google's servers across the globe.

The extent of speed up depends on a variety of factors such as content on your pages, browser, geographic location of access, bandwidth, etc. You can run tests to measure the speed up of your site in a few minutes. Page Speed Service is currently offered free of charge to a limited set of webmasters during this trial period. Pricing will be competitive and details will be made available later. You can request access to the service by filling this web form.

Answer 3

Google Chrome's build in profiler is very good for this

Under "Developer tools" option menu choose the timeline tab and you get a full graph of the loading times of each element on the page

Answer 4

Besides WebPageTest, I like Zoompf for performance assessments

Answer 5

My favorite free site is JMETER for overall speed under load; and firefox's firebug and yslow are great plugins for individual components.