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YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.

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I have been testing the PhantomJS yslow script with a number of sites and found one that performs terribly. Below are the timings of netsniff and yslow for two sites,...

I am measuring load time with Yslow using PhantomJs but in each run i am getting different results(interms of response time as well as number of http requests).Is there any...

Another Firebug 1.12 compatibility problem. Honza

Please allow us to use YSlow on Firefox without having to install Firebug.

I am trying to use yslow as a chrome extension but its not working for iframes.

I update the latest version of yslow in FF25 and still not working

Constant CPU usage even while firefox is "idle" Looking at `top` while firefox is running, but not being used : - If YSlow! is installed and enabled, usage is constantly...

While some images of the size are lazy loaded, PhantomJS couldn't get those images. So the yslow couldn't analyze those images.

A page that has an svg chart or other svg image on it should not count towards the total dom element count on the page, since many sub-elements is a...

It seem like this should not receive an A: ![image](https://f.cloud.github.com/assets/23369/1242324/36f1612c-2a3b-11e3-9768-9cc0dbbb44ce.png) and neither should this: ![image](https://f.cloud.github.com/assets/23369/1242325/3ef83f44-2a3b-11e3-8082-fd93094289c4.png) This is using YSlow 3.1.2 on Chrome.