The art of tuning a website to deliver it's content quickly and efficiently to the user over a potentially low bandwidth connection.

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3
votes
2answers
3k views

why is my site slower with amazons cdn?

so I have move most of the static objects to amazons Cloudfront CDN example: http://images.storyfollower.com/images/cycleOfStories.jpg which through cname point to the cdn Now I just ran a speed ...
3
votes
2answers
182 views

What is the easiest and fastest way to get statistics of a webservice response time?

I implemented a webservice with node.js and want to test its response time. I don't just want to do the test with one connection attempt, but I want statistics about multiple attempts, telling me the ...
3
votes
3answers
216 views

Does background video affect SEO?

Does the extra loading time that a background video has, affect SEO? Or that does not really affect it because the HTML already loaded and the video is just streaming after? Does it make a difference ...
3
votes
1answer
60 views

What are the effects on loading times when conditionally loading and concatenating scripts?

Suppose you have a script in your theme that you always need on every page - say 'animate-menu.js' (10KB) - and you have one that you only need on one specific page - say 'validate-contactform.js' (...
3
votes
1answer
254 views

Why SPDY-enabled pages are not loading faster?

I've just enabled the SPDY module on nginx, as explanained on the SPDY module site. I expected a speed enhacement on my site, but I haven't noticed it. Using Firefox 25 and Firebug, I tried to take a ...
3
votes
1answer
59 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 ...
3
votes
2answers
714 views

KPI's for Webmasters

Do you know any Key Performance Indicators for Webmasters? What should be measured and monitored?
3
votes
1answer
44 views

Do AdSense policies allow loading ads in the window load event?

The official help does not mention such modification, but people mention this solution at various places on the net, saying they do this for quicker page load. How can one be sure that it's an ...
3
votes
0answers
226 views

How to test high load on a website? [duplicate]

Possible Duplicate: How do you load test your application? Hi, I am nearing a point of finalizing a website and it will soon be released. We have bought some traffic and advertisement ...
2
votes
6answers
106 views

Regarding improving site performance

I have an e-commerce website and have close to 9000 products in it with each product having 3 pictures at least. Now my site is loading at an average speed but I want to improve it, as I will be ...
2
votes
4answers
969 views

Google bots are severely affecting site performance

I have an aggregate site on a linux server that pulls in feeds from a universe of about 2,000 blogs. It's in Wordpress 3.4.2 and I have a cron job that is staggered to run five times an hour on ...
2
votes
4answers
1k views

Webpage Post Submits vs AJAX?

Which is better and why? I can see where a site that works 100% in AJAX might optimize a bit better, due to not having to reload the page on each click. But I am a huge fan of the big submit button ...
2
votes
3answers
589 views

Website has “lagging” effect. Causes? Tips and tricks to fix?

So I have this site here which has major performance issues. Scrolling is very slow, hover effects have a bit of lag and other similar issue. Unfortunately right now I am working off a cheap host so I ...
2
votes
3answers
668 views

How to decrease the frequency of Google/Search-engine bots crawling my site?

My server handles my visitors ok, but recently I found there are many search engine bots crawling my site and my server gets quite busy serving these bots. My site generates over 1000 posts each day, ...
2
votes
2answers
56 views

Is there a performance difference between background-size:cover and background-size:100% auto?

I know what the difference is between background-size: cover and background-size: 100% auto. I'm curious if there is a performance difference between the two and which one would be preferred?
2
votes
3answers
149 views

What open source software is available to speed up your website?

I use WP SuperCache and W3 TotalCache to optimize the speed of my Wordpress website by caching. That really helps! But lately I have been building a website myself, basically from scratch. Is there ...
2
votes
5answers
1k views

Is there a good tool or service for tracking and analyzing website response/download time?

I am looking for a simple tool or service to track the server-side performance of a website over time. It would be nice to have the possibility to register a set of URLs for different page types and ...
2
votes
1answer
143 views

Tradeoffs around using a query string vs embedding version number in the CSS/JS files [duplicate]

I was reading articles and forum posts about using version numbers in CSS/JS files. http://www.stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring/ http://www.particletree.com/...
2
votes
2answers
911 views

How to improve load time when Pingdom says 80% of the load time is the web browser waiting for data from the server? [closed]

tools.pingdom.com gives a speed analysis of any given website. What does it mean when most of the load time is spent on waiting? I am using a CDN.
2
votes
1answer
755 views

PageSpeed - Minimize DNS lookups: why not use IP address for resources

One of the recommendations from web performance optimization services is to minimize DNS look ups. I fully understand why they recommend this but why not just point references to external files to ...
2
votes
3answers
64 views

Using one document for all images

I have some icons around 100x100. I typically save out each icon as a .png but I wanted to know if I included all the .pngs in one document would it be ideal and improve load time? If one document ...
2
votes
1answer
62 views

Slower site with the *same* configuration than a mirror copy…?

I've got this Drupal site (ligadelconsorcista.org) that I have to move it from one server to another. The reason was that my older host even when it was pretty decent, it started a couple of months ...
2
votes
1answer
96 views

Duplication of menu through javascript or PHP: Which is better for SEO and page performance?

I have a site with a typical desktop dropdown menu. For the mobile menu (and on touch devices), I am using javascript to slide it out onto the page from the right side by touching a menu button. The ...
2
votes
1answer
66 views

For SEO, can content containing keywords be written into the page using JavaScript and still rank well?

We have a list of product summaries that appear on several different product listing sections of our website. Currently, these products are rendered into the HTML, and end up in different caches (...
2
votes
1answer
166 views

Performance hit of a lot of unused font-faces

If you have an html file, and in that html file you link to styles.css which covers all the styling of the page. Then inside of styles.css you have something like @import url('../css/fonts.css'). ...
2
votes
1answer
223 views

Set expiry date for image or resource

How do I set expiry date for an image? Is this a server side operation or can it be done as an html tag attribute? What if I only want to set different expiry dates for different images/resources?
2
votes
1answer
57 views

Which version of my site is preferable for SEO

As you can see from the graphs below, the blue version shows content sooner, but the overall page load is slower. Thoughts?
2
votes
1answer
103 views

From which file size is it worth to implement images as Data URI?

As the title says: for site speed up sake it is good to implement small images like Data URIs directly into HTML source code, like inline CSS (background image url), or with usual img src. But from ...
2
votes
2answers
31 views

What consumes less resources on the client side, an animation with gif or CSS?

What is better for the client side, an animated gif or the same animation done as a sequence of images with CSS ?
2
votes
2answers
70 views

How to analyse website performance

I've tried searching a lot and basically here is the problem. I have a website but I'm unable to pin point the reasons of why the performance of the website is so slow. We have shifted to a high end ...
2
votes
1answer
4k views

How do I fix “high response time” warnings from Google Webmaster Tools? [duplicate]

In my Google Webmaster Tools account, there is warnings about my site: Some URLs listed in this sitemap have a high response time. This may indicate a problem with your server or with the content ...
2
votes
1answer
1k views

Can I set Cache-Control in the .htaccess file for a specific part of a document (just a section of the <body>)

I noticed, by using Google Page Speed Insights, that if I structure my HTML to load the critical, above-the-fold content first, my page will improve performance - and it woks (with now current perf. ...
2
votes
3answers
625 views

Slow site because of WordPress Evolve theme

I've installed WordPress lastest version in my site. It is using Evolve theme. Demo of this theme is here. The original demo is also slow. Slowing is like that, site is waiting for 9-10 seconds for ...
2
votes
1answer
3k views

Plesk: View system resources (e.g., RAM, CPU, etc…) for a VPS

I've setup my first VPS. Previously I've always been hosting my projects on a shared hosting account. I run a couple of little personal projects on the VPS, including one that is continuously scraping ...
2
votes
1answer
176 views

Why is there a huge gap before in my WebPageTest after the HTML has been downloaded?

I am trying to improve front-end performance of my website, and there is a 3.5 second lag before the user actually sees anything, and I'd like to improve this. Here is a screenshot: And here is the ...
2
votes
3answers
350 views

Measure server performance

I'm using a shared hosting for my website. How to find out if the performance of the server changes? I'm asking because my hosting company told me that some other site on the server is slowing down ...
2
votes
1answer
1k views

Everything needed to run a high-traffic web site

I'm an experienced front-end web developer, while my back-end experience has occurred only within the context of Drupal. Basically, the deeper things go into the back end, the more inexperienced I am. ...
2
votes
1answer
145 views

any way I can fix this cphulk situation?

I should probably sue the cpanel guys right about now. The point is, I'm receiving all these strange messages in my logs about cphulk (brute force detection system) not being able to do its job of ...
2
votes
1answer
36 views

Data center locations for hosting an international website

My web site is currently hosted in the US in NYC and SFO data center locations. I'm not too familiar with DNS, but both IP's point to my domain and the visitor's computer probably would pick the DNS ...
2
votes
1answer
40 views

Speed of prefork+ruid2 with more connections on limited memory

Currently I am using Apache in a server with WHM/Cpanel and I'm currently using Prefork MPM with Mod Ruid2 to process PHP pages. While the setup allows it to run very fast, I'm limited to processing ...
2
votes
2answers
60 views

Caching a changing site

I run a website where the static content changes at least 4 times a week and I'm trying to figure out the best header arrangement to use. Currently I have all caching related headers in use. I have ...
2
votes
2answers
54 views

For performance reasons: have different pages for search engines and users

I have a SEO question for single page applications. We're working on a SPA (not yet public) that displays tables of numeric data to users. The data volume is large, number aggregations are costly ...
2
votes
1answer
68 views

Is there any way to simulate a slow connection between my server and an iPad (without installing anything on the server)?

Some of our webapp users have difficulty on slower connections. I"m trying to get a better idea of what that "speed barrier is" so I'd like to be able to test a variety of connection speeds. I've ...
2
votes
1answer
101 views

Why requests/Sec is very low in jmeter benchmarking while website serves so many users?

I've created a Thread Group to test my server load. In the following picture you can see that throughput is about 27 per min. The site is a high traffic website. Is jmeter precise on showing this data?...
2
votes
3answers
110 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 ...
2
votes
1answer
92 views

Need a study about average latency due to HTTP request and server processing time when downloading images that are a part of DOM

I'm writing a thesis about css sprites and need to know the of the average HTTP request overhead when establishing a connection to download an image file that is a part of DOM. We conducted a study ...
2
votes
1answer
317 views

Internal CDN and setting up subdomain to increase maximum parallel connections

I've heard that browsers can have around maximum of 6 parallel connections per domain at a time. So I decided to have another subdomain "cdn." then use mod_rewrite to point to media folder then ...
2
votes
1answer
121 views

CDN for site with target market in Australia

I was told that http://www.edgecast.com/ is very good CDN provider for Australian market. I have a cloud server based in Sydney Australia but was wondering whether it's even worth getting cdn as my ...
2
votes
1answer
43 views

Do private collaboration platform really need private file access? [closed]

I need to make private collaboration platform, where the website is not open to public registration, and all the posts is only accessible by the members. The members is management team of a company. ...
2
votes
5answers
154 views

What's the best web site performance tool for end-users?

When I receive reports that my website is running slowly, I would like to be able to point the end-users to a performance/profiling tool that is easy to use and that has a feature where the end-users' ...