I need tools to test page load speeds for websites which are hosted locally on a LAN, and which are not accessible via WAN connections. In the past I was using Firefox with YSlow and Page Speed which helped me a lot, but since the latest Firefox version (in my case 39.0) YSlow is buggy and Page Speed disappeared from Firebug.
Any new tools which can be installed to do these performance tests?
I'd suggest Yslow from the command line if you're finding the plug in buggy. I'd also suggest Google Chrome Developer tools as an alternative to Firebug.
Try using firebug
plugin for Firefox , see the Net tab.
or
inspect element (Ctrl+shift+i for windows) , the Network tab on Google Chrome
Related
Lately I have been having trouble with debugging using Chrome dev tools. Once I open dev tools and start using the javascript debugger or the HTML inspector, every action will take at least a few seconds. Another developer with the exact same machine does not experience similar problems. I have tried reinstalling chrome and installing Chrome Canary, but the problem still remains the same. It did not use to be like this, and it is driving me mad, so that is why I am reaching out to the stack overflow community. Does anyone know any common reasons why dev tools would be performing so badly on a decent computer? Are there any settings I can try disabling, etc?
I am running Windows 10, and the client-side technology stack I am working with is based on React and Webpack with hot reload.
How can I use IE8 Developer Tools to inspect network traffic?
Specifics:
I need to test if files have loaded or if they have loaded slow. In Firefox/Firebug I can do this by using the NET tab.
Restrictions:
I cannot install additional software, so answers in Examine http response headers in IE8 are of no use to me. :( I am debugging issues on restricted computer systems and do not have admin rights.
Rumors?
I have read that there is no way, at all, to inspect network traffic using IE8 Developer Tools, is this true?
Thanks.
In http://blogs.msdn.com/b/ie/archive/2010/04/22/ie9-developer-tools-network-tab.aspx it says:
The developer tools include some new capabilities and improvements
over the tools in IE8:
A new tab for inspecting network traffic.
So this is impossible in IE8 (without installing additional software, that is).
That's that.
I have a ski holiday website http://www.powderwhite.com which Google Webmaster Tools say is slow (70% slower than other websites on the Internet).
Problem is that Google Developer Tools say we have done 90% of what is required to improve speed, speed tests also show the site is fairly fast and other websites hosted on the same virtual server are faster.
I think we have done lots to the site itself to make it fast and the hosting provider is saying it is not their servers. Anybody know what may be wrong? (I suspect jQuery or some javascript is slowing the site).
Try using fiddler tool. You can launch this then open the website in IE and in fiddler you can see each of the elements loaded on the page. In the right window pane you can look at the statistics and inspectors to see if there is one image or file that is giving a slow response.
The latest versions of Firebug in Firefox feel like they've been regressing. Performance is abysmal. This is a common complaint amongs everyone on my team, and increasingly among many other web developers online.
Are there any alternative extensions for Firefox that gives similar functionality(DOM inspector, Net tab, console)?
Firefox now has built in developer tools similar to Firebug, but not so full-featured:
https://www.mozilla.org/en-US/firefox/technology/
http://www.webmonkey.com/2011/12/an-overview-of-firefoxs-coming-developer-tools/
Fidler Web Debugger is an option, although it's not as integrated.
Other alternatives include:
Jash: Javascript Shell
Internet Explorer Developer Tools
FireAtlas (extension to FireBug, but helps debug ASP.NET)
The IE8 Debugger is pretty good, for IE. They seemingly took several cues from Firebug.
I agree with you as far as Firebug's performance goes in recent releases, therefore I have found myself using the excellent WebKit Inspector - in both Chrome and Safari - and Opera Dragonfly a lot more recently.
If you were to post your specific problems about Firebug performance to the Firebug newsgroup or bug list, then we'd just fix them. No one has ever complained about performance. We had some problems with memory but these were fixed.
jjb
For Http/Https traffic inspection HttpFox is very great tool. u'll get an add-on for firefox in the web. However it doesn't have the cool dom inspection feature of firebug.
Check out
Dung Beetle
Also, exclusively for XPath expressions, but pretty fast,
XPath Checker
I need a tool to measure a website's performance that's free and does not require any changes to be made to the code (jsp asp pages). All help is appreciated.
For performance measurement I recommend you YSlow, it's a Firefox add-on integrated with Firebug, it analyzes your web pages and tells you why they're slow based on the rules for high performance web sites.
Screenshot
Also with the Firebug Network Monitoring tab, you can see which resources are taking more time and bandwidth to download:
(source: getfirebug.com)
You could also use Fiddler which will work for browsers other than Firefox. (But will not profile javascript code)
See this post
The other answers to this question focus on performance of a single user of the site from their browser's point of view. If you want to test the performance of your server, for example, to see how many concurrent users you can support, you need to be looking at tools like JMeter.