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

learn more… | top users | synonyms

64
votes
10answers
33k 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?
26
votes
4answers
63k 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?
19
votes
2answers
2k 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 ...
17
votes
3answers
34k 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 ...
17
votes
1answer
8k 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 ...
13
votes
1answer
19k 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 ...
12
votes
4answers
2k 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 ...
12
votes
5answers
305 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: ...
12
votes
1answer
711 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 ...
11
votes
5answers
2k 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 ...
11
votes
3answers
8k 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 ...
11
votes
1answer
3k 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 ...
9
votes
6answers
6k 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 ...
9
votes
1answer
2k 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 ...
8
votes
2answers
4k 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 ...
7
votes
4answers
7k 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 ...
7
votes
4answers
1k 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 ...
7
votes
2answers
6k 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 ...
6
votes
5answers
5k 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 ...
5
votes
5answers
269 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 ...
5
votes
4answers
350 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 ...
5
votes
3answers
2k 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 ...
5
votes
1answer
130 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 ...
5
votes
1answer
841 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 ...
5
votes
1answer
2k 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 ...
5
votes
2answers
451 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 ...
5
votes
3answers
864 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:...
5
votes
3answers
780 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 ...
5
votes
3answers
820 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 ...
5
votes
1answer
75 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 ...
5
votes
1answer
247 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 ...
4
votes
4answers
372 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?
4
votes
1answer
89 views

Can minifying the HTML of page have a negative effect on SEO?

I've been reviewing the speed of a site using Google PageSpeed, and one of the things it told me to do was minify the HTML of the page. I'm fine with this, but by minifying the HTML (or any other ...
4
votes
1answer
157 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?
4
votes
2answers
212 views

Google Webmaster Tools - Why site performance graph goes up and down, even if the site has never changed?

This is my site 7 months graph from Google Webmaster Tools site performance util. As you can see the graph goes up and down, with big differences: less than 1 second up to 5 sec. Since I never ...
4
votes
2answers
596 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 ...
4
votes
1answer
102 views

Can I easily track site performance over time with Google PageSpeed?

Are there any implementations of the Google PageSpeed API that allow one to track the performance of a site over time?
4
votes
1answer
1k views

How to fix “Leverage browser caching” error from Page Speed plugin

I'm using the Page Speed Firebug plug-in to check my sites. But I don't know how to fix the "Leverage browser caching" error, since I don't know you specify a cache lifetime to the browser in images ...
4
votes
1answer
7k 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" ...
4
votes
2answers
323 views

Mobile Browsers! Do they ignore `<noscript><img>` (Responsive Design with Framework Zurb Foundation (Interchange/Noscript))

Experimenting with Interchange Responsive Images I'm experimenting with Interchange by Zurb Foundation to serve various images versions to different devices. For example 200x100 for mobiles, 300x100 ...
3
votes
4answers
4k views

Page loading problem. Page is very slow

Regarding the domain http://www.pravninasvet.com, there is a problem where it sometimes loads fast, sometimes very slow. The domain is registered by godaddy, the server is in Germany. But when the ...
3
votes
2answers
1k views

Images on a subdomain, hosted on the same server — will simultaneous downloads increase? (CDN)

Browsers only allow you to download a limited number of concurrent files from the same domain. Would a subdomain for images (basically as a content delivery network) on the same web hosting server ...
3
votes
1answer
194 views

What if one certain page is much slower than the rest of your website?

I have a very fast website, but there is one overview page that queries a lot and takes 16 to 17 seconds to load. Will this have an impact on my SEO?
3
votes
2answers
5k 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 ...
3
votes
2answers
164 views

How to solve 503 issue

I'm participating in a web project. It's a Joomla web page and it's gained a lot of visitors in the past months. Actually we are receiving donations each year to pay site's hosting and domain. The ...
3
votes
2answers
8k 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 ...
3
votes
1answer
761 views

Page Speed Optimization Questions: defer parsing and specifying a char set?

Continuing to optimized a web site, I'm using Chrome's Dev Tool add-on for Page Speed. I've been able to do a good bit of performance tuning thanks to its suggestions, but these two have me perplexed:...
3
votes
2answers
181 views

Does url length have any impact on page load speed?

Our site has been doing fairly well in terms of load speed and so I don't want this to bring that down as a slower page load speed impacts SEO visits.
3
votes
1answer
150 views

What's the threshold for creating data URI in css?

I'm interested in benchmarking, or best practices. I have 10 icons on my website. They are all background:url(…) no-repeat;. Assuming sprites are not the answer (for any god given reason) how big or ...
3
votes
2answers
363 views

Page Speed no longer working for Firefox 4?

Hey there, I love Google's little Page Speed tool, I've seen some wonderful speed advances on sites I've worked on because of it, but since I've upgraded to FF4 it doesn't seem to be in Firebug ...