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...
128
Ernest Mueller
mxyzplkiv
Nov 28, 2007 7:31 pm
So this is a good point. In terms of extending YSlow, it seems to me that it would be possible to quantify (with some caveats) not only to what degree you fit...
129
Steve Souders
steve_souders
Nov 28, 2007 9:04 pm
Estimating performance savings is difficult. In fact, the major performance service companies have tried to build response time simulators (person-months of...
130
Steve Souders
steve_souders
Nov 28, 2007 9:47 pm
Hi, Ernest. This server is not returning the correct Date value. As mentioned in the article, I made the YSlow patch an option because "web servers with...
131
Ernest Mueller
mxyzplkiv
Nov 29, 2007 5:00 am
I would say a tool would still be useful if it made base case assumptions. 1. No caching, or user specified percentage. 2. Geographically - where you are 3....
132
Steve Souders
steve_souders
Nov 29, 2007 7:33 pm
My hesitation is estimating the improvement in _response time_. I'm not too optimistic about that. But, I _do_ think it would be great to have a before vs....
133
Ernest Mueller
mxyzplkiv
Nov 29, 2007 9:56 pm
Right; I think that as long as the estimator is clearly just for your circumstances it's an easy calculation to get improvement. If you just d/led that 100kb...
134
Ernest Mueller
mxyzplkiv
Dec 3, 2007 10:10 pm
Hmm, incorrect date? Date on the servers and the load balancers seem to be OK and NTP synced; what do you mean exactly? (And it's a little weird this only...
135
Steve Souders
steve_souders
Dec 4, 2007 12:32 am
The HTTP spec states that the Date response header "represents the date and time at which the message was originated." It's currently Dec 4 (GMT), but some of...
136
cbs4275
Dec 4, 2007 5:07 pm
Steve, I'm reading your book and it says that Cache-Control was introduced in HTTP/1.1 to be an alternative to Expires. In the tool I have some warning for...
137
Steve Souders
steve_souders
Dec 4, 2007 5:23 pm
The expiration time has to be at least 48 hours in the future. In this case it expires in 20 minutes so the benefit is reduced. -Steve...
138
cbs4275
Dec 4, 2007 8:41 pm
Thanks for the quick response! Can this be set in the Cache-Expires or the Expires? Does the browser read these in a specific order? -Chris...
139
Surat Singh Bhati
suratbhati
Dec 5, 2007 6:35 am
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.21 says: If a response includes a Cache-Control field with the max-age directive, that directive...
140
sureshtytus
Dec 5, 2007 1:53 pm
I got a YSlow report for my site. In the Stats tab it shows, 0.0K 15 undefineds What does 'undefineds' refer to? Can someone explain? Thanks Titus...
141
Stoyan Stefanov
ssttoobg
Dec 5, 2007 11:08 pm
Hi guys, The new YSlow is out. The highlights: * It crawls frames (recursively) to get and examine components, this means all components in frames/iframes are...
142
Rakesh Rajan
rakeshxp
Dec 5, 2007 11:18 pm
Congrats on the new release! YSlow has indeed become an indispensable part of web development. I have a question regarding the score calculation for CSS...
143
Stoyan Stefanov
ssttoobg
Dec 5, 2007 11:24 pm
Hi Rakesh, Thanks for your kind words! Including stylesheets with @import has the same effect as adding them in a <link /> towards the end. Those get...
144
Rakesh Rajan
rakeshxp
Dec 5, 2007 11:28 pm
Thanks for the clarification. So this numbers would just affect our development mode. - Rakesh ... Thanks for the clarification. So this numbers would just...
145
Steve Souders
steve_souders
Dec 6, 2007 12:02 am
With the new release of YSlow 0.9.0, it's possible for YSlow to find HTTP requests that are not attached to any DOM elements. In this situation, YSlow...
146
jeromakay
Dec 6, 2007 3:41 am
Hi Performancers! Hope you're doing well with your site's tunning, I'm testing some code I've build based on Steve's tips, and I want to try a real CDN besides...
147
Steve Souders
steve_souders
Dec 6, 2007 3:43 am
I've recently heard suggestions for Panther Express (http://www.pantherexpress.com/). -Steve...
148
jeromakay
Dec 6, 2007 3:45 am
Hi Steve, Thanks for the suggestion, I'll check out their site. After playing with it, I'll study how geographical locationed CND content serving works. I'm on...
149
sureshtytus
Dec 6, 2007 7:04 am
Thanks Steve, The URL I was looking at was the home page of http://www.informationweek.com Titus...
150
Steve Souders
steve_souders
Dec 6, 2007 6:21 pm
Hi, Titus. Those are redirects. This is a bug in YSlow 0.9 that we'll fix now. When doing Stats it's mistakenly calling redirects "undefined". Thanks. -Steve...
151
Ernest Mueller
mxyzplkiv
Dec 6, 2007 7:49 pm
That's a good topic; does anyone have any other CDN suggestions? Akamai is the big dog but there's competitors too, any leads? Thanks, Ernest ...
152
Ernest Mueller
mxyzplkiv
Dec 7, 2007 7:57 pm
Hmmm, well maybe I'm being dense, but it seems that regardless of Date header, some things are showing up right in the and others not YSlow Net panel largely...
153
j.elventails
Dec 8, 2007 9:55 pm
Hi folks! Thanks for the excellent Yslow - its simply rocks. With my latest yslow upgrade, I noticed that slowness hit the fan. Yslow seems to try and load a...
154
oemebamo
Dec 11, 2007 11:02 am
Hey all, I've got a question regarding gzipping the components of your web pages. I'm new to this group and see most of the posts here relate to the excellent...
155
Barry Hunter
b_b_hunter
Dec 11, 2007 11:53 am
We actully pipe js/css via PHP, and use this to decide if use gzip, this includes a few exceptions we found on the net somewhere (will try to dig out the...
156
g_kljajic
Dec 11, 2007 12:05 pm
Hello all, I have updated YSlow today to 0.9.2 (previous version was 0.8). After this, the following error message started to appear in firebug on almost every...
