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Empirical Study of Web Site Speed on Search Engine Rankings

This article summarizes the results of a study on load time factors in Google search engine rankings. The empirical study found that website crawl time and its variability strongly correlates with search engine position. more »

Case Study: PhiladelphiaOrthodontists.com Mobile Responsive Redesign

What happens when you convert a site to be mobile responsive? Mobile traffic increased by 24% and mobile browsers stayed 80% longer after a responsive redesign. more »

Case Study: Walkerworldtrade.com Server Upgrade

Moving to a faster server can cut page load times by more than half, and improve behavior metrics like conversion and exit rates. We use Google Analytics to test Walkerworldtrade.com before and after a server upgrade. more »

Form Conversion Rate Optimization

Learn how a combination of form optimization and speed improved conversion rates by more than 92%, more »

Upgrade to a Faster Server: Results

We further explore the results of upgrading to a faster server. Overall the site showed improved response speed and website "stickiness." Average page load times improved by 48% to 60% server response times improved by more than 60%, and people stayed longer, viewed more pages, and bounced less. more »

Upgrade to a Faster Server

Upgrading to a faster server can improve web page speed significantly, up to 66% faster for first paint time and 29% for load times. We moved an example site to a faster server to test the performance improvements. more »

Website Speed and SEO

Having a consistently "responsive" site will ensure that your site will be crawled and fully indexed, and will not suffer slow-loading ranking penalties. Optimizing the TTFB of your site is a good place to start to minimize the effects of speed on your SEO rankings more »

Wordpress Performance Optimization

Learn how to speed optimize Wordpress for faster web pages and ultimately better conversions and rankings. Optimized hosting, performance plugins and modules, profilers, and other tools and software can help you pinpoint performance bottlenecks and speed up your site. more »

Avoid Mass Web Hosting

We investigate moving an example site from a slow mass host to a lightly loaded host and measure the results. Server response times were reduced by 82.1% and variability by about 7 fold. more »

Use a Website Accelerator

Automated website acceleration products can speed up your site without developer intervention. We test the effectiveness of Radware's Fastview appliance on a test site and find significant improvements in speed. more »

Optimize Start Render Time

HCI guidelines say load useful content within 1-2 seconds, do your pages measure up? Learn how to optimize the start render time of your web pages to speed up useful content display. more »

Flush HTML Early and Often

Developers can speed up start render times by flushing a portion of their HTML document to the client even before the entire HTML file is ready. Both Yahoo! Search and Google use this performance technique. more »

Localize External Resources

Even popular offsite widgets can slow down or hang your web pages. Learn how to localize offsite resources to improve web page performance. more »

Blocking JavaScript with Web Page Test

Learn how to simulate the elimination of JavaScript with Web Page Test. By eliminating, deferring or converting your JavaScript behavior into CSS you can speed up your page rendering and load times. more »

Blocking CSS with Web Page Test to Simulate Elimination of CSS

Learn how to simulate the elimination of CSS with Web Page Test. By eliminating, combining, and recoding your style sheets using modular or object oriented CSS you can speed up your page rendering and load times. more »

Diagnosing Slow Web Servers with Time to First Byte

Slow web servers can be caused by a number of factors. You can test for slow server response times with the time time to first byte metric. more »

Velocity 2011 Web Performance Conference

Highlights from the 2011 installment of O'Reilly's Velocity web performance conference, held in Santa Clara, CA in June. The author sums up the tools and tips from the conference as well as a book signing. more »

Page Speed Online

The online version of Google's Page Speed browser extension features a new mobile web page analysis mode. more »

Serving 2012 Olympic Tickets: London2012 15, CoSport 0

The race is on to get tickets to the 2012 Summer Olympics in London, England. Are the web sites handing the traffic as fast as the athletes they promote? more »

ETags Revisited

Learn how to configure or eliminate ETags to improve website performance. more »

Automatically Speed Up Your Site with mod_pagespeed for Apache

mod_pagespeed is an open-source Apache module that automatically speeds up web sites. Through a number of filters, mod_pagespeed trims the fat off your HTML, CSS, JavaScript and images, reduces HTTP requests, and improves caching. In this article we introduce mod_pagespeed and summarize the available filters. more »

Velocity 2010 Web Performance Conference

Highlights from the Velocity 2010 conference on web performance. This sold-out event explored the latest technique for fast websites, and is a must-see for performance engineers. more »

HTTP Compression

HTTP compression uses standards-based gzip and deflate compression algorithms to compress your XHTML, CSS, and JavaScript to speed up web page downloads and save bandwidth. more »

Web Page Performance Thesis

A Ph.D. thesis on web page performance quantifies the key factors in web page response times. Uses software to measure, model, and monitor response times and improve user satisfaction. more »

Offload Resource Intensive Scripts to Improve Server Performance

This article shows how offloading resource intensive scripts can significantly improve web server performance. By offloading the Web Page Analyzer script to a separate server, we improved response times by over 98%, improved throughput by a factor of 40, and significantly reduced response time variability. more »

O'Reilly Books on Web Performance

We sum up the available books on web performance from O'Reilly. more »

Solid-State Drive Web Server Test

We test a new server with solid-state drives and faster processors. Upgrading our dedicated server improved performance by 35% to 50%. more »

Optimize Parallel Downloads to Minimize Object Overhead

With the average web page growing past 50 external objects, object overhead now dominates most web page delays. Increasing parallel downloads by using multiple hostnames can realize up to a 40% improvement in web page latency. more »

Use Delta Encoding to Compress RSS newsfeeds

Learn how to use delta encoding to compress your RSS XML newsfeeds. Save bandwidth by using delta compression for your RSS files. more »

Suture CSS or JavaScript Files to Reduce HTTP Requests

Learn how to "suture" CSS or JavaScript files together before delivery from the server to save HTTP requests. You'll have your organization and eat it too with this server-side approach to merging files. more »

Use Server Cache Control to Improve Performance

Configure your Apache server for more efficient caching to save bandwidth and improve web site performance. A web cache reduces latency and improves web site response times. more »

Get a Dedicated Server Hosting Your Web Site

Upgrading to your own server improves performance, reliability, and control over your website. Andy King talks about his experience moving to a dedicated server for WebSiteOptimization.com. more »

Abbreviate URLs with mod_rewrite

We look behind the screens at Yahoo and Webreference to see how using short abbreviated URLs and mod_rewrite can save space for maximum speed. more »

Rewrite URLs with Content Negotiation

Content negotiation can make your URLs shorter and more abstract. By rewriting URLs without file extensions to the right resources you can save bytes and migration headaches. more »

Use Conditional Server Side Includes

Conditional SSI let you deliver customized content to different browsers and platforms without requiring additional HTTP requests. With conditional CSS, you can include additional styles for modern browsers, without upsetting older ones. more »
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Last modified: February 26, 2015.

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