Comments on: Free-falling waterfalls

By: Stoyan

Stoyan — Tue, 15 Dec 2009 16:50:43 +0000

@tim – looking at a string, it’s hard to judge what goes into an ETag. So YSlow only complains when you’re using IIS and the default IIS formatted ETag or you’re using Apache and the default pattern. If it sees the default, there’s a chance that you didn’t touch the ETags and may be at risk. If it’s anything but the default, it won’t complain, assuming the people who configured their ETags know what they are doing.

By: Kyle Simpson

Kyle Simpson — Tue, 15 Dec 2009 03:36:32 +0000

Another great article. I'd love to see more coverage of some of the dynamic script loaders that are starting to come out that allow scripts to load in parallel instead of with blocking behavior. It's an important component in helping the waterfall free fall, as you said. My project (which Steve Souders has helped with) is LABjs for exactly that purpose. One key thing this approach provides is giving the same kind of parallel loading behavior that new browsers like FF3.5 have to all other browsers (even IE6 and 7!). Here's a write up I did explaining the basics of how LABjs does its thing: http://blog.getify.com/2009/11/labjs-new-hotness-for-script-loading/

By: Alexsandro

Alexsandro — Mon, 14 Dec 2009 23:03:25 +0000

Nice WebPageTest Tool, Cuzillion I knew.
Thank you for good article.

By: Tim

Tim — Mon, 14 Dec 2009 19:32:23 +0000

You mentioned Yslow will warn about misconfigured etags – do you know if Yslow knows the etags are misconfigured, or if the warning given is shown whenever etags are sent as part of the response?

By: V1

V1 — Mon, 14 Dec 2009 19:12:26 +0000

Just to be sure, i always new clean domain to publish static content on. This way, when ever you are using 3rdParty script, that potentially set the cookie for all sub domains you are 100% sure than your static server will not / never be affected.

A domain only costs like 10$ max, so that a money well spend.

By: Jayaprakash

Jayaprakash — Mon, 14 Dec 2009 09:38:26 +0000

Excellent article. It seems that recently the number of your blog posts suddenly increased and reader like me are very much happy about it.

One small correction – “In this serias of performance posts” It seems that serias should be series.

By: Tuzemec

Tuzemec — Mon, 14 Dec 2009 08:57:02 +0000

Wonderful article as usual