Here are some site performance tools I use to fine-tune our sites. Google recommends that you experiment with these tools as multiple simple changes can improve the experience for your users around the world by several seconds.

Google Site Performance tools

Page Speed

Open source Firefox/Firebug Add-on that evaluates the performance of web pages and gives suggestions for improvement.

Other developers:

AOL Page Test

Open source tool for measuring and analyzing web page performance using Internet Explorer.

Cuzillion

Tool for quickly constructing web pages to see how components interact and how behavior differs across browsers, sometimes in unexpected ways.

Fiddler 2

Web debugging proxy logs HTTP/S traffic between your computer and the web.

Firebug

Firefox Add-on lets you edit, debug, and monitor CSS, HTML, and JavaScript in active web pages.

Hammerhead

Firebug Add-on measures the load-time of web pages.

httperf

Generates HTTP workloads and measures web server performance

HttpWatch

HTTP viewer and debugger integrated with Internet Explorer and Firefox to provide HTTP/S monitoring without leaving the browser window.

IBM Page Detailer

Assesses web page performance and provides details include the timing, size, and identity of each item in a page.

JSLint

Checks for code quality problems in JavaScript programs.

JSMin

Removes comments and unnecessary whitespace from JavaScript files.

Microsoft VRTA

Visualizes web page download, identifies areas for performance improvements, and recommends solutions.

mon.itor.us

Provides a Ajax dashboard interface, checks server performance and availability, generates uptime reports, tracks visitors, checks CPU, memory and other systems resources, and alerts when it detects abnormalities.

Pylot

Open source tool for testing the performance and scalability of web services.

Smush It

Upload images for lossless compression and optimization. Provides a report of bytes saved and downloads a zip file containing the optimized versions of the files.

Wbox

Tests page load benchmarking, web server and web application stress testing, and verifies correct configuration of virtual domains configuration.

Yahoo! YSlow

Firefox/Firebug Add-on that analyzes web pages and suggests ways to improve their performance, based on a set of rules for high performance web pages.

YUI Compressor

JavaScript minifier designed to yield a higher compression ratio than other tools.

Ivan Walsh is a technology writer based in Dublin, Ireland.

Learn how to save time, make money and develop digital products.

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