Questions tagged [page-speed]

Page-Speed normally refers to the time it takes for a web-page to be presented to a browser in a "fully loaded" state.

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77 votes
12 answers
51k views

How can I simulate a slow connection for page load?

I have a fast server, and a reasonably fast home Internet connection. How can I simulate my page loading on a slow connection?
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  • 1,290
44 votes
2 answers
26k views

What is recommended minimum object size for gzip performance benefits?

I'm working on improving page speed display times, and one of the methods is to gzip content from the webserver. Google recommends: Note that gzipping is only beneficial for larger resources. Due ...
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  • 604
40 votes
4 answers
106k views

How do I set expiration headers for CSS, JS, and Images?

I have recently analysed my website with pagespeed addon on firebug. It suggested me to set expiration on CSS, JS and image files. I am wondering how do i do this?
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  • 1,658
25 votes
2 answers
3k views

Ideas to improve website loading speed?

Are there any ways in which I can improve the loading speed of a website? I know that Google is really pushing loading speeds and with the popularity of mobile websites it's now imperative that sites ...
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  • 1,522
25 votes
2 answers
11k views

Is gzip compression available for GitHub pages?

I'm using GitHub pages to host my site. While checking Google PageSpeed Insights, it recommends that I enable gzip compression. Since I have a static site hosted on GitHub, I'm not sure that is ...
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  • 408
23 votes
7 answers
44k views

How to test the speed of a page that is guarded behind login page?

For public page, I can use pingdom.com to calculate the response time/uptime of a page over a certain period of time. However, pingdom cannot time the response time of a webpage guarded behind a ...
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  • 467
21 votes
2 answers
7k views

Leverage browser caching on GitHub pages

After using Google's PageSpeed Insights for my site [ http://flashmallach.github.com ] the biggest error I'm still coming up w/ is leveraging browser caching. I found some solutions that suggest using ...
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  • 311
18 votes
1 answer
25k views

Character set not specified in HTTP headers error

When testing this page with Page Speed, I get the a Specify a character set error: The following resources have no character set specified in their HTTP headers. Specifying a character set in HTTP ...
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  • 1,023
17 votes
3 answers
43k views

What's an acceptable "Avg. Page Load Time"?

Is there any industry rule of thumb for what's considered an unacceptable load time v. an OK one v. a blistering fast one? We're just reviewing some Google Analytics data and getting 0.74 Avg. Page ...
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  • 1,260
14 votes
2 answers
35k views

How to optimize the load time of initial connection and SSL handshake phase of a web page on a 3G network?

My website www.example.com(SSL enabled) is hosted on Amazon EC2 shared hosting. It loads faster (load time < 2 seconds) on a wifi/broadband connection. Issue is on 3G network in mobile**(H mode and ...
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14 votes
4 answers
5k views

Pagespeed Insights reports that Google Analytics is blocking main thread in page load

I'm chasing page speed, partly as proof that getting 90%+ is consistently achievable. My main issue now is Google Analytics. In the below example, it's loaded via Google Tag Manager, so there's just ...
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13 votes
4 answers
4k views

Loading main javascript on every page? Or breaking it up to relevant pages?

I have a 700kb decompressed JS file which is loaded on every page. Before I had 12 javascript files on each page but to reduce http requests I compressed them all into 1 file. This file is ~130kb ...
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  • 315
12 votes
5 answers
9k views

Blank image. What to use: Base64 vs 1x1 JPEG image

I am building a website and I want to make HTTP queries as few as possible for a better website speed and seo. The page I just created is showing images on scroll (images have an attribute data-scr ...
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  • 311
12 votes
6 answers
8k views

Is it possible to use asynchronous google adsense, i.e. non-blocking?

I know that there is a Asynchronous method of using Google Analytics but is there something similar for adsense? I can't find one from my current searches - I was wondering whether there is a common ...
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  • 1,483
12 votes
5 answers
344 views

Should JavaScript referenced in the head section be served from the same hostname as the main document?

I was under the impression that for the best performance, Javascript should be treated as static content and served from a cookieless domain along with CSS files, images, etc. But Google says here: ...
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12 votes
1 answer
1k views

How is github so fast?

When you browse repositories on github ( for example https://github.com/mojombo/jekyll/tree/master/bin) it feels like it uses ajax and does not reload the whole page every time. However the url really ...
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11 votes
4 answers
16k views

Specifying image dimensions to improve browser performance

I recently ran an audit on my web site using Google Developer Tools. My images are all the same size (500 horizontal by 300 vertical pixels) so I thought it would be better if I left out the image ...
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11 votes
3 answers
9k views

How can I replicate Google Page Speed's lossless image compression as part of my workflow?

I love that Google's Page Speed is able to losslessly compress a lot of my images, but I'd love to make it part of my workflow, prior to uploading a site and making it live. Is there anything I can ...
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  • 447
11 votes
3 answers
26k views

Leverage browser caching for Facebook, Google+, or other 3rd party resource files

I tested my website with Google PageSpeed Insights. I did cache optimization in my .htaccess, but it didn't affect resource files that are from Facebook and Google+ Leverage browser caching ...
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9 votes
2 answers
7k views

When to use and not to use ETags

I was just looking at our site on WebPageTest.org and one of their recommendations for speeding up a website is: ETag headers should generally not be used unless you have an explicit reason to need ...
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9 votes
2 answers
8k views

PageSpeed reports that Google Analyics is "unused Javascript" when installed by GTM

I'm setting up a new Drupal 9 site. I have added Google Analytics via Google Tag Manager. I'm using Universal Analytics and these are my tags: Track link clicks Track page views Track scroll depth ...
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8 votes
2 answers
1k views

How does Google judge page performance if audience is from one specific region & server is also in same region

I want to know how does Google Judge page performance, let us our server are located in India as our audience is from India and page speed over all is fine based on FF developer tools & Chrome .. ...
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  • 749
8 votes
4 answers
10k views

What is the screen size used by Google's PageSpeed Insights for mobile previews?

Google's PageSpeed Insights allows one to check a website's speed issues for both desktop and smartphone devices. I have some media query CSS for smartphones on my website, but I am unsure about ...
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7 votes
1 answer
1k views

How much critical CSS can be inlined before there is a negative performance impact?

I've heard that to avoid render-blocking issues, it's good to inline critical CSS directly in the <HEAD> tag by including the actual CSS in <STYLE> tags, and then load the rest of the CSS ...
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  • 237
7 votes
2 answers
10k views

Cache external static scripts?

In my never ending quest for a faster website, I thought perhaps I could cache some scripts. I'm using Yslow to rate my site, everything is pretty much A (which is great, our website on Pingdom loads ...
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  • 2,370
7 votes
4 answers
4k views

Tool to check resource load order

Is there a tool I can show clients that will take a page's HTML and show: a) the order in which external resources will load, b) which resources are blocked on other resources being downloaded? For ...
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6 votes
2 answers
894 views

Is it normal to have some huge anomolies in Google Analytics site speed tracking?

I've recently started using the new _trackPageLoadTime function in Google Analytics to measure page load times. However, I have noticed a few pages appear with a huge "Average Load Time". One page is ...
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6 votes
1 answer
2k views

Does Google value DOMContentLoaded or Load Time more as a ranking signal

I am working on a project to improve the performance of my sites web pages and by removing render blocking CSS and JS have halved the DOMContentLoaded time of some critical pages but have not reduced ...
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  • 171
6 votes
1 answer
1k views

Connection speed for a website from UK to Australia

I need to open a website only for Australian customers. The fact is that our provider's servers are all housed in the UK. What do you suggest is better? Leaving our website in the UK? Or buy a ...
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6 votes
3 answers
86 views

How can I determine if my site speed is affecting my conversions?

I need to convince my team that our load times are way too high. Load times for the /cart is around 10 seconds and load times for individual pages are around 6 seconds. I've seen all the studies about ...
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  • 93
6 votes
1 answer
11k views

requests with http://. should I block?

I took a look at my logs and found out that earlier this year, random computers made a request to resources and my log recorded it as follows: "GET http://testp3.pospr.waw.pl/testproxy.php HTTP/1.1" ...
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5 votes
5 answers
298 views

Speeding up website"speed"?

We use Google Analytics to measure traffic on one of our websites (who doesn't?). One of the thing that strikes us is the "page speed" tab. It shows that our website takes on average 5.69 seconds to ...
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5 votes
4 answers
379 views

Strategies for very fast delivery of webpages

I run a website Cucumbertown with an initial pay load of nearly 9KB zipped. All my js is delayed loaded with requirejs and modernizer is the only exception. Now all my webpages are Nginx cached and ...
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  • 191
5 votes
2 answers
3k views

Why would my site load slower after I switched to https?

I bought and implemented an SSL certificate on my website and it seems to load a lot slower than before. Why does this happen and how can it be fixed?
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5 votes
2 answers
2k views

Check if an image is already optimized for the web

I have found this tool that optimizes images for the web. What is surprising for me (of course, there will be other tools like this :)) is that it only optimizes the uploaded image if it is possible, ...
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5 votes
2 answers
11k views

Slow website response? How can I fix this issue?

I have pingdom monitor on my website: http://stats.pingdom.com/t68xhgex256f/375513 For North America (big target market) the response time is 1-2 seconds. This is far too slow. Is there anything ...
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  • 2,370
5 votes
1 answer
150 views

Does Google include the time to load images, for a single page, as part of the page speed?

we all know that Google's affects your page rank with the load time of a page. How? That's part of the secret sauce. But we know that page speed is a serious factor. So -> what is considered the ...
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5 votes
1 answer
921 views

Page Speed Online vs Chrome Extension

In optimizing a content blog of mine with the goal of achieving the highest page speed score possible for obvious reasons (user experience, SEO, etc..), the results I'm obtaining are throwing me for a ...
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5 votes
1 answer
493 views

Will Google use field or lab data for ranking sites with core web vitals performance metrics?

Starting in May 2021, Google will begin using their Core Web Vitals metrics to inform search ranking. Will they will use field or lab data as the source of these metrics? Our site scores well on field ...
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5 votes
1 answer
770 views

Google Pagespeed asks to eliminate "above the fold" files that are required for the page to render

I have run my website into Google Pagespeed and it returned "Eliminate render-blocking JavaScript and CSS in above-the-fold content" The problem is that those "render blocking" assets are required ...
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  • 237
5 votes
1 answer
3k views

Effect on SEO of lazy scrolling on HTML comments

I am thinking about using a JS script that lazy loads HTML when scrolling ( http://ivorycity.com/blog/2011/04/19/jquery-lazy-loader-load-html-and-images-on-scroll/). I am not too sure about whether ...
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  • 53
5 votes
2 answers
823 views

Actual page load time vs. perceived one

You know how all around the web, people are pushing for smaller and smaller page load times ? They do so with good reason, especially with Google now factoring it in in their way to rank pages. It's ...
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  • 173
5 votes
3 answers
1k views

Best practices when loading images for improving page loading speed

I am working on optimizing a page's loading speed. Here are some analytics: Notice how the images, although only accounting for 65% of the total size (1.1MB), are by far the slowest loading assets: ...
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5 votes
3 answers
861 views

How do I set up Google PageSpeed Service for my site?

It seems I can't set up Google's PageSpeed Service. When I do it in the Google services panel, a message comes up like: "Your site may be directing live traffic." What can I do to resolve this and ...
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5 votes
5 answers
2k views

Average page load time reported by Google Analytics is much slower than I observe when I visit my site

Google Analytics reports our site to have an average page load time of about 4.5-6 seconds. Naturally, this sounds as a concern. However, we never see these page load times when the page is rendering,...
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5 votes
3 answers
1k views

What guidelines should be followed when implementing third-party tracking pixels?

Background I work on a website that gets a fair amount of traffic, and as such, we have implemented different tracking pixels and techniques across the site for various specific reasons. Because ...
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4 votes
4 answers
452 views

Prepare website for heavy traffic

A site of mine is going to be featured on a very popular tech blog. I already upgraded my server to handle the traffic. What other things should I be prepared for?
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  • 99
4 votes
2 answers
116 views

Is combining / concatenation of CSS and JS technique considered deprecated?

Google used to recommend webmasters to combine external CSS and JS files to improve the page speed. One of these pages was here: https://developers.google.com/speed/docs/best-practices/rtt#...
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  • 145
4 votes
2 answers
474 views

What is more important: time to first byte, or overall load time?

In terms of being rewarded with higher rankings on Google, what is a more important attribute for a website to have? A fast time to first byte, or a fast overall load time? I manage around 50 ...
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  • 1,634
4 votes
1 answer
297 views

Google Page Speed Insights is recommending inline styling and complaining about render blocking JS. Are these even relevant?

Sometimes, I feel like Google is living in its own bubble. Most of the time, when you run your page through their tool, it complains either about "page rendering blocking JS", "how you should save 1,...
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