Page-Speed normally refers to the time it takes for a web-page to be presented to a browser in a "fully loaded" state.
41
votes
6answers
11k 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?
12
votes
4answers
15k 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?
12
votes
1answer
840 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 ...
11
votes
4answers
940 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 ...
11
votes
5answers
263 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: ...
10
votes
1answer
393 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 ...
10
votes
1answer
1k 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 ...
8
votes
2answers
1k 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 ...
8
votes
7answers
4k 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 ...
7
votes
3answers
7k 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 ...
7
votes
4answers
220 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
3answers
2k 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 ...
6
votes
1answer
6k 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 ...
5
votes
2answers
1k 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 ...
5
votes
4answers
289 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
582 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 ...
4
votes
4answers
272 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
98 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 ...
4
votes
2answers
167 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
283 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 ...
4
votes
2answers
362 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
283 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 ...
4
votes
3answers
320 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 ...
4
votes
1answer
706 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
58 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 ...
3
votes
4answers
169 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 ...
3
votes
2answers
108 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
2answers
56 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
1answer
294 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 ...
3
votes
1answer
446 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 ...
3
votes
2answers
4k 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
33 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
119 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
2answers
332 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 ...
3
votes
1answer
881 views
How to diagnose slow loading web pages?
Pages at my domain sometimes load very slow.
The domain is registered at 101domain, server is in Europe.
Reply from 91.185.209.164: bytes=32 time=60ms TTL=60
Reply from 91.185.209.164: bytes=32 ...
3
votes
1answer
424 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 ...
3
votes
1answer
53 views
Statistics about development of average connection speed and latency over the years
Are there any statistics about the development of average internet connection speed and request latency from households to major sites over the years?
I find this information very useful for ajax ...
2
votes
3answers
219 views
Resizing the images for faster page load
I was checking my sites page load time. I saw that I could improve it by reducing the size of the images which were getting resized by css. Now I wanted to ask if resizing the images is worth the page ...
2
votes
4answers
844 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 ...
2
votes
3answers
307 views
DNS lookup when using a CDN
Using a CDN can vastly improve the load time of a website. I been thinking of using it to host all my external files like CSS, JS, Images, Videos etc. However I was thinking when linking to a CDN, ...
2
votes
2answers
567 views
How do I modify the HTTP headers?
Google page speed rank demands me to set an expiry date or a maximum age in the HTTP headers, by changing the "Expires" and "Cache-Control: max-age".
The site is hosted on a hosting company (not in ...
2
votes
1answer
1k views
last-modified/etags - to include or not?
Google's PageSpeed plugin suggests that a website should include Last-Modified and ETag headers:
Specify a cache validator "Resources that do not specify a cache
validator cannot be refreshed ...
2
votes
1answer
180 views
Two URL CDNs are better than one for SEO and Speed?
For example, my URL is:
www.site.com
For SEO, PageSpeed and Server Tweaking for ultimate performance, and speed, my code places static files like JavaScript, CSS and Images on my CDN:
...
2
votes
2answers
71 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 ...
2
votes
4answers
163 views
Define page load time
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 ...
2
votes
1answer
76 views
Parsing google site speed in analytics
I'm having a hard time making heads or tails of the Site Speed graphs in Google Analytics. Our site speed is fluctuating wildly from month to month, despite a large sample (the report is "based on ...
2
votes
2answers
101 views
Determine web page draw time via a program
Google Chrome has a nice tool to determine the time the page begins drawing, in the Network tab in Developer Tools. Similarly sites like webpagetest.org can tell you the draw time and give you the ...
2
votes
3answers
35 views
Async load of secondary content; Google says “slow”, users see what they want faster
We have a performance problem on our site, and we're digging in to correct some rather basic issues -- we know we have many opportunities to improve performance -- this question is about one, in ...
1
vote
2answers
233 views
Do Google/Twitter etc actually use distributed servers to serve their resources?
I'm trying to optimize my website and running a few tests using webpagetest.org. I tried the test from Singapore and Hongkong.
I saw that while all facebook, quantcast, chitika scripts were loading ...
1
vote
3answers
608 views
Serving images from different domain
Google audit:
Serve static content from a cookieless
domain (15)
2.65KB of cookies were sent with the following static resources. Serve
these static resources from a domain
that does not ...
