yslow | YSlow analyzes web pages and suggests ways | Performance Testing library

I'm trying to optimize my website speed according to Google Speed Test and GTMetrix YSlow. One of the recommendation is to "use cookie-free domains", there are 12 components that are not cookie-free.

The 12 components are images and some CSS and JS files.

What is the problem and how to fix it?

I I check my performance web on the pagespeed tab, the result like this :

If I check on the yslow tab, the result like this :

Why is minify js / css page speed and yslow different?

The message like this :

I have moved all my static assets to cloudfront.net, and when I view my source code, my CSS and JS and images are already hosted in cloudfront.net. But when I check GTmetrix.com, my use cookie-free domains is still graded F, and my main domain is still showed in the list, instead of cloudfront.

I already cleared my cache, cloudflare cache, browser cache, and all kinds of cache, but Yslow in GTmetrix still doesn't detect that I'm using a CDN (cloudfront.net).

Anyone here who encountered the same problem?

Actual GTMetrix Result: https://gtmetrix.com/reports/www.flyskyjetair.com/SgHBKXsJ

Actual Code: view-source:https://www.flyskyjetair.com/

We have a BigCommerce website that's scoring very poorly in GTMetrix ("E") for PageSpeed and YSlow (https://www.dogids.com). The list of items that are killing our performance are items I know how to easily fix on a WordPress website, but I'm not sure what the limitations are for BigCommerce as it sounds like their platform works more like Shopify in that you're limited to template files.

THE QUESTION If you've developed and optimized a BigCommerce site, could you let me know if these optimizations are possible?

1. JS and CSS minification (important)
2. Defer JavaScript (important)
3. Expiry Headers
4. Caching rules
5. Optimizing the order of styles or scripts
6. Making fewer HTTP requests (45 external calls)

Thank you in advance!

I would like to manipulate data from a database to use it with my bubble chart.

Here is what I did :

1) A data.php file that puts the requested data in JSON format: ​

The Cache and ETag thing is driving me insane.

If I change a page and go to it on the browser, the changes I've made aren't there. I have to refresh to see them. That can't be normal. I could have a visitor coming back to my main page and the new article entries not reflecting.

I already tried unsetting the ETags and all that as well.

What can I do so that the contents are indeed cached, but if they have changed since they were saved, the updated version will show?

The YSlow test also gives me this warning: Misconfigured ETags. Which also happens if my htaccess is empty. That suggests it's my host's problem, but the same happens to both of my sites, hosted differently.

This is how my .htaccess looks:

im working on optimizing my website that is hosted on an Apache web server, after working on my css files (combining them in one file ... ) and img alt, optimizing images size and enabling gzip for browsers ,... i got always YSlow Score below to 58% and PageSpeed equal to 80% ,, please need help !

the image is showing the components that said that they don't have a "far-future expiration date" (click here)

this is my .htaccess file where i put some configuration that i found as a solution on Gtmetrix.com

We use imagebam, imagevenue, pixhost etc. to serve our blog posts thumbnails but those are slows down our website and its score by pagespeed, gtmetrix. How to optimize those external image host thumbnails? How to add expire headers into them? How to leverage their browser caching?

Here is our score: https://gtmetrix.com/reports/www.vintagepornbay.com/lH6oi2Cc PageSpeed Score (43%) YSlow Score (51%)

I test my website on gtmetrix.com it show me the following error to improve my website yslow scrore.

serve static content from a cookieless domain

how to solve this error?