Ok, that means that in crude words we can say, Response time = (time for download from network) + (time for decoding of components, eg jpeg) + (time for actual...
Hi, In our homepage (current yslow score 95%) we decided to cut an URL request to a 1x1 pixel image and instead use the data URL scheme: http://nestoria.co.uk/...
Our company is in the midst of analyzing the impact of 8 of the 12 rules for our site. The first three: GZIP, ETags and Minify JavaScripts, demonstrated no...
The rules are in approximate priority order, so you'll see a greater improvement with with Rule 1 than Rule 13 (Etags). Also, it's good to get at least 100...
... take ... When you say that they demonstrated no improvement, what do you mean? How are you defining success, and how are you measuring performance? We...
So with Keynote/Gomez you have to be careful that your type of measurement will show the effects of the kind of improvement you're looking at. For Keynote,...
Ernest, Joe and Steve, Thank you for your responses. The performance tool we are using is Silk Performer. The metrics we use match the definitions of frontend...
Wow, this is a great thread. Thanks Ernest and Joe for your responses. Srichardjr - I would warn against putting too much value on numbers gathered from one...
[See the full blog on Yahoo! Developer Network: http://developer.yahoo.net/blog/archives/2007/11/velocity_web_pe.html] O'Reilly just announced Velocity ...
Hi everyone, hi Steve, Just want to let you guys know that I've had a look over Steve's book, and all I can say is.... it's all there! :) Very happy with it,...
Hi Vladimir, This is great feedback! Recently I had the pleasure of joining the performance team at Yahoo! which means working with Steve. There will be more...
Hi Stoyan, Thanks for the warm greeting. I am really excited about all this performance work you guys are promoting in here. Scalability is a big issue...
... myself ... <http://www.vladimirated.com/web-development-high-performance-websites-b\ ... book, ... Hi everybody, just received Steve's book and read a...
Hi, I was curious to see if minifying CSS still makes sense if the content is delivered gzip-ed. I think it does. For testing I used the Perl CSS::Minify...
The YUI Compressor (http://developer.yahoo.com/yui/compressor/) minimizes both JS and CSS. It's best used in batch mode, whereas JSMin is better for realtime...
Hi, Yeah, we tried the YUI compressor. We just didn't want to introduce Java as a dependency that's all. We don't even use the Perl module I wrote about....
Hi Everyone, We are using DOJO as part of our website. It has been included at the end of body tag, but when I check YSlow, it tells me 6. Put JS at the ...
I also have a query regarding Rule "Minify JS": All our JS code including Dojo are compressed with the only exception that the compressed dojo js contains a...
So I was investigating a slight bump we had in site performance, and was led astray briefly until I figured out what was going on - so with Firebug + YSlow, I...
Net Panel is not accurate in some cases. YSlow fixes the biggest problem, so what you're seeing with the YSlow patch enabled is _more_ accurate. More info...
But in this case, the YSlow version never shows my csses come down (have cleared cache, etc.). They're in the CSS panel but just not the Net panel. Ernest ...
Rakesh, In my opinion, I believe you shouldn't be so unflexible when it comes to YSlow and your code. Yslow does just some checks, benchmarks for your site. If...
Vladimir, Yups, I know that my JS code is optimized even though YSlow indicates it otherwise. What I trying to figure out was on how YSlow figures this out and...
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