Levy Carneiro

Google Chrome

Browser performance problems? Simple tricks to the rescue:

“To speed up browsing, Google Chrome resolves domain names before the user navigates, typically while the user is viewing a web page. This is done using your computer’s normal DNS resolution mechanism; no connection to Google is used. As a result, user navigation time in Google Chrome when first visiting a domain is on average about 250ms faster than traditional browsing, and the occasional but painful 1-second-plus delays are almost never experienced.”

And how it works:

“DNS prefetching just resolves domain names before a user tries to navigate, so that there will be no effective user delay due to DNS resolution. The most obvious example where prefetching can help is when a user is looking at a page with many links to various unexplored domains, such as a search results page. Google Chrome automatically scans the content of each rendered page looking for links, extracting the domain name from each link, and resolving each domain to an IP address. All this work is done in parallel with the user’s reading of the page, hardly using any CPU power. When a user clicks on any of these pre-resolved names to visit a new domain, they will save an average of over 250ms in their navigation.”

Check the full article.

Very clever and efficient.

It was about time!

Google has announced an initiative to help developers to make their applications and websites to run faster. Nothing better than Google to push this kind of movement.

Let’s make the web faster is the main page, filled with increasing number of articles and videos on page speed optimization. Check it out!

I’m looking for ways to setup an automated script that will run YSLOW and PageSpeed tests on any given site. The idea is to monitor a site’s performance over time. You work hard to reach something around 90/95 on these test reports, and you don’t want other developers in the team (or yourself) to mess things up one month ahead, when you completely forgot about page’s performance So, if you know something about this, please let me know. Thanks!