Does anyone have any experience with the performance of large sprites? We're optimizing some of our sites and one sprite is 80kb and 800x1000px . This seems a...
On a page that includes an iframe that pulls in another HTML document, YSlow complains that the CSS files included by that iframe are not "at the top", even...
Hi John, this might help you (Single Web Page Test for free): http://www.gomez.com/info_center/instant-test.php not recurring but you can test it from various...
Hi all, as all Browsers now can open more than two connections a question pops up. Will this have negative impact to the webservers ? As more sockets are used...
... It depends on how your web server is configured. You'd typically configure a single web server to handle 15-20 concurrent connections, and maybe keep...
Also depends on how large-scale your site is. If you're only serving the base page from your hosts and everything else from a CDN the increased connections...
Figured I'd throw http://www.grabperf.com into the mix here. We have a bunch of our (AOL) pages tested there. It's just the base HTML page so keep that in...
So it depends what you mean. By open source do you just mean 'something free,' or do you mean software you can install/run for free, or do you really mean open...
Hi, You can send YSlow bugs by using any of these: * complete this feedback form: http://developer.yahoo.com/yslow/feedback.html * email yslow@... *...
Possibly. Although each user is being completed faster, so your concurrent users should go down somewhat to compensate. (If you have 100 users hit your site...
One potential wrinkle is that the browsers tend not to close the connections when they finish the last request on the page (at least all of them, be ...
... Out helpdesk reports that users run into problems with IE6 and IE7 due to outdated search result pages, even if they execute the search again from the...
Hi Ernest, that is a real interesting experiment you did. What i wonder - how long can web servers stand that if all users do this settings. I think (regarding...
I can at least speak for one company that runs “high frequented web-pages” that since we use a CDN for all of our static content we’re not expecting to...
Hey guys, I created a screencast walking through analyzing your website for performance using Pagetest, and some of the why's and how's of fixing things. ...
I really like it. It's this kind of basic explain-everything walkthrough that can get more people to use these tools. (In fact I see webpagetest.org has a...
Yeah - but there's lots of download accelerators out there that use parallel http conns to get large files and I was wondering why. So I fiddled with that on...
The only reason it would help to have multiple parallel downloads is if the TCP stack isn't tuned well (or the server throttles connections). I'll put money...
I love the web-based version of AOL Pagetest it's great. However it's not very useful for authenticated web application development so I downloaded the...
The browser plugin is actually the same as what is on the web so they actually perform identically (the web interface just kicks off a browser session that has...
Hi, I'm trying to think in terms of serving flash videos to users using apache. I'm starting from the premise that HTTP requests are expensive. The regular way...
Seems like it would also cause problems for someone who wants to "jump around" in the video. But I thought progressive download usually took care of all this?...
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