Firebug Net Panel: more accurate timing
There’s a lot of work that transpires before I can recommend a performance tool. I have to do a large amount of testing to verify the tool’s accuracy, and frequently (more often than not) that testing reveals inaccuracies.
Like many web developers, I love Firebug and have been using it since it first came out. Firebug’s Net Panel, thanks to Jan (“Honza”) Odvarko, has seen huge improvements over the last year or so: customized columns, avoiding confusion between real requests vs. cache reads, new (more colorful!) UI, and the recent support of export.
Honza has come through again, delivering a fix to this problem in Firebug 1.5 (currently in beta as firebug-1.5X.0b1 which requires Firefox 3.6 beta). The fix included help from the Firefox team to add the actual time to each network event. The results are clearly more accurate:
A few other nice features to point out: Firebug Net Panel is the only packet sniffer I’m aware of that displays the DOMContentLoaded and onload events (blue and red vertical line). Firebug 1.5 Net Panel has multiple columns available, and the ability to customize which columns you want to display:
With these new features and improved timing accuracy, Firebug Net Panel is a great choice for analyzing HTTP traffic in your web pages. If you’re not subscribed to Honza’s blog, I recommend you sign up. He’s always working on something new that’s helpful to web developers and especially to Firebug users.
Note 2: This is being sent from Malmö, Sweden where I’m attending Øredev.