I'm trying to improve/optimize my website performance and cannot make it work.. And I running out of ideas. This is my Site in Desktop with 99/100 score. And this is my website performance in Mo...

I know that many webmasters believe that page speed means nothing. However, I’m confident that this factor is one of TOP 3 in the Google’s decision of ranking any website. I tired of seeing how G...

I'm working on a shopping site. We display 40 images in our results. We're looking to reduce the onload time of our page, and since images block the onload event, I'm considering lazy loading them ...

I am working on responsive website. I have code that loads the right image size for the screen size. The problem I am facing is that I am using Retina images for some of the mobile devices. Meanin...

I am using Ftp When I run my website on page speed tools, it gives me the following message "Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser t...

Loading external javascript via async script tag at the end of a webpage I'm trying to find out what is the best way to load javascript in terms of page speed. Let's take this example: FILE.JS: ...

I have jQuery added at the bottom of the page. However, when I run my site on pagespeed insights (Mobile), I get the error: Eliminate render-blocking JavaScript and CSS in above-the-fold content...

UPD I've read related pages carefully, they doesn't answer my particular question. What do the percents mean? Well, there's an attempt at explanation: google page insights will tell you clearly ...

I'm working on a site which I havent coded from scratch and in firebug the css files are being displayed as: style.css.pagespeed.ce.5d2Z68nynm.css with the pagespeed extension. Can anyone tell me w...

I have the following js script referenced on the bottom of the page: <script src="http://example.com/test.js" type="text/javascript"></script> Google PageSpeed suggestion is to defer...

I am using CloudFront and many time I see Wait Time and Receiving Time is too high. According to Firebug document, Waiting time and Receiving time means: Waiting - Waiting for a response from ...

I have a web page that references Bootstrap 4 from a CDN. In the head of my HTML page, I have the following: <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2...

Is it possible to run Google Page speed from the command line? If so, how? I'm interested in automating nightly or daily Google PageSpeed calls that will inform me after a commit or daily if I've c...

I'm using Apache with mod_pagespeed. For some reason I can't figure out, mod_pagespeed thinks an image is much smaller than it actually is, which means once the image gets scaled up, it's really bl...

When you run Google's PageSpeed plugin for Firebug/Firefox on a website it will suggest cases where an image can be losslessly compressed, and provide a link to download this smaller image. For ex...

I created a design for my website in Photoshop and exported all images as 24-bit PNG images. Later, running a PageSpeed test on the website showed that the images can be further reduced upto 50% in...

I have a wordpress website I'm creating for a client temporarily hosted on http://dev.eatfit.co.nz/ I'm noticing that often (but not every time) that I browse a page (for example the home page), w...

Just wondering if the amount of document.ready calls affects page load speed. Is there a way in Gulp / Grunt to uglify / minify JS by removing seperate document ready functions?

Google PageSpeed says I should "Specify a Vary: Accept-Encoding header" for JS and CSS. How do I do this in .htaccess?

I am using Gtmetrix to test my page load time. I enabled gzip compression on my site by adding code to .htaccess .htaccess code: <ifModule mod_gzip.c> mod_gzip_on Yes mod_gzip_dechunk Ye...

Google Pagespeed complains when you have blocking CSS in an external file. In HTTP/1 this probably makes sense, but what about now with HTTP/2 ? If you inline critical CSS (above the fold), that b...

<sc:Image> and <sc:FieldRenderer>, when rendering a MediaItem, generate html code that looks like the following: <img src="~/media/twitter.gif" alt="Twitter" width="100" height="22"...

Google recommends (https://developers.google.com/speed/docs/insights/OptimizeCSSDelivery) using following JS code to optimize page speed (async CSS loading) <script> var cb = function() { ...

Our site is considering making the switch to http2. My understanding is that http2 renders optimization techniques like file concatenation obsolete, since a server using http2 just sends one reque...

We all know adding a far-future expiration date to static resources is a good practice to increase our websites' page load speed. So we've ensured it for all of our resources BUT the all-too-common...