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Category Archives: performance

>Ajax Performance

>Here’s a great blog about client-side JavaScript and CSS: Ajax Performance. Some articles of interest:

Interesting stuff!

 
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Posted by on 24 March 2008 in ajax, css, ecmascript, javascript, performance

 

>Work around slow DNS

>If you have a slow DNS server that is causing you delays, for example while browsing the web, then try switching to a faster DNS server.

If that does not work, then here’s a trick you may want to try: make your computer perform DNS lookups for the hostnames you use most often (such as www.google.com) on a regular basis.

On Mac OS X, Linux and UNIX systems this can be accomplished using a simple cron job, just execute a command like:

nslookup http://www.google.com

or:

host http://www.google.com

This will perform the DNS lookup, and -as a side-effect- add the result to the local DNS cache.

 
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Posted by on 2 February 2008 in cache, caching, dns, performance

 

>Improve website performance with Yslow

>
A while ago I blogged about Firebug, a great Firefox extension for analyzing web pages (including CSS and JavaScript) and the interactivity between a browser and web servers.

Yahoo! have built on Firebug to produce a tool that goes even further. They call it: YSlow for Firebug.

Based on “Thirteen Simple Rules for Speeding Up Your Web Site” YSlow analyzes a web page, produces some reports (with a score card) and gives advice on improvements. This can be a great help in improving your website’s performance and reduce it’s bandwidth usage.

Also see this blog entry:

 

>Improve DNS lookups on your Mac

>Here’s a quick tip for Mac OS X users that want to speed up their DNS lookups. If you don’t get annoying ‘Looking up server’ messages frequently, you’re safe to skip this one:

Warning: This is only for power users (those that know what UNIX and Terminal are about).

 
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Posted by on 19 June 2007 in bind, dns, hint, mac, macos, macosx, performance, speed