I retired from personal blogging in July 2008.
But you can find me over at http://blog.xero.com.
Posted by rod@drury.net.nz in Apple, Development at 2:48 am on Friday, 4 July 2008
Apple are allowing developers to really push the envelope with Web apps.
Check out http://developer.apple.com/webapps
I hadn’t noticed that Safari 4 has some great debugging tools. You can even see the latency of your resources being loaded into the browser.

The faded blue is latency. Very cool.
You enable the tools here …

Lots of new toys to play with.

Great tool to come standard in the browser. There are plenty of browser plugins around that give this sort of information but nothing comes close to the clean and simple UI of the Safari version.
I always use Firebug, the Firefox plugin. Essesntially it provides the same information but it also integrates with YSlow which is an awesome tool built by the guys at Yahoo to assist in optimising site performance.
If network latency gets your heart pumping on a Friday morning :-) then YSlow will keep you going all weekend..
Trust Apple to really nail the UI.
As Richard says, Firebug is an absolute must-have plugin for web developers and does much of what Safari appears to have built in.
Just curious though - I can’t find any obvious link on that page for checking out Safari 4’s features. Do I need to register on the site and log in?
… I think I just outed myself as a non-Mac user! Oops!
No worries, Safari on Windows has it too… i have v3.1.2
I find the plugin excellent for showing clients why sites should be designed and coded by those who know what they’re doing in a visitor friendly manner. It’s simple, and tells them everything they need to know after a quick browse to a couple of sites like tv3.co.nz and trademe.co.nz.
Phil, there aren’t any publically available yet, apart from some vague text on the SnowLeopard page @apple.com: http://www.apple.com/macosx/snowleopard/
“Because Snow Leopard delivers the fastest implementation of JavaScript to date, web applications are more responsive. Safari runs JavaScript up to 53 percent faster with Snow Leopard.”
There is a PDF of the changes in 4, but as it’s sourced from the Apple Developer Connection, it is covered by a non-disclosure agreement.