Instead, you need a tool that has active development and support. It should also be built with both mobile and desktop in mind. If you did use YSlow Chrome extension then this one will be familiar to you. The Google Lighthouse chrome extension is installed the same way. The extension provides a handy button at the top of chrome that you can click when you want to run a report. Once you have it installed go to the page that you want to test.
It is also what will focus on here. This option is useful for developers working on code changes to a website. It allows them to run an audit as soon as a change is made. The performance report gives a score from With being the best possible score and also very difficult to achieve. To create your own ruleset, click on the Edit button next to the Rulesets pull-down menu. The New Ruleset screen shown below will be displayed:. Initially all the rules will be unchecked. Select the rules you wish to include in your ruleset.
Then click the Save ruleset as To run YSlow using your customized ruleset, select the ruleset from the Rulesets pull-down menu. YSlow will ask Do you want to run the selected ruleset now? Click on Run Test to run YSlow with your ruleset. You can make additional edits to your ruleset by selecting your ruleset in the Rulesets pull-down-menu and clicking on Edit.
You can remove rules previously selected and add new rules. When you complete your changes, either click Save to save the revised ruleset with the same name or click Save ruleset as If you no longer need the ruleset, you can delete it by clicking on the Delete button.
Click on the Printable View link on the YSlow toolbar to display the page performance analysis. YSlow asks what information you want to display. Select one or more of the available views as shown in the following image:. YSlow will open a new window, formatted for printing, containing the information from the views you selected. YSlow's Tools menu provides several reporting tools that you can use to get information to help with your web page analysis.
Following is a screen shot of the Tools menu:. JSLint gathers all external and inline JavaScript from the current web page, submits it to JSLint, a JavaScript verifier, and opens a separate window with a report about problems with the page's JavaScript. The report includes approximate locations within the source of the problem code. Often times the problems are syntax errors, but JSLint looks for style convention problems and structural problems too. All JS collects all external and inline JavaScript from the page and displays the scripts in a separate window.
You might want to use this tool to check which scripts the page actually uses and whether the page is pulling them in correctly. All JS Minified collects all external and inline JavaScript and removes comments and white space to decrease the size of the scripts.
You can replace your JavaScript with the minified version to improve performance of the web page. All CSS collects all the inline and external stylesheets on the page and displays them in a separate window. If you click on All Smush. This tool will tell you which images can be optimized and will create a zip file with the optimized images. Thanks Wayne I updated the answer. Because the answer it is no longer useful I would delete it if I could. Gave you an upvote for effort.
There should be a delete link next to "edit" under the answer text, I didn't think any special amount of rep was needed to delete your own answers, but I may be wrong about that. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta.
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