From some weeks am very confused about this question that how check a website speed and how to increase or reduce it?. And what factors do matter in it and what should do to increase your site speed and how much it should be please give the proper answer.
To check the speed try installing the latest code for Google Analytics, then check your site stats as it now records site speed.
To speed up your site the first thing you should try and do is reduce the size of all files, and minimise the number of files you use. E.g. try using a CSS sprite rather than 20 separate iamges for navigation menus with images.
Download the YSlow extension for Firefox (comes with Firebug) or the one for [url=https://chrome.google.com/webstore/detail/ninejjcohidippngpapiilnmkgllmakh]Chrome. It’ll tell you how fast your page loads and what to do to get it to load faster.
You can check your website speed ===host-tracker.com===.Website speed depend on server uptime and internet speed. Is your server is quality full internet speed is good then your website speed is good. You can add addon Mozilla Sugestron Speed Dial 0.9.12 if you used mozzila.
Thank you
I use the YSlow extension for Firefox, but prefer the Page Speed extension for Firefox.
Page Speed will give lots of feedback, detailing how you can improve response times. It also provides practical assistance. For example, offering you optimised image and css minimised versions.
To use Page Speed, you need the Firebug Firefox extension already installed. There is also a Page Speed Chrome plug-in available, but I haven’t used it.
Alternatively, there is an version of Page Speed that you can run online at:
Page Speed Online
Either you can use latest google analytics code to track you website speed or you can use any tool to check website speed. There are many free tools are available on internet. IF your site is delaying in opening it could result in reducing of visitors to your site. So, try to sort it out by reducing some images & using CSS code.
For checking your website speed please visit the following link
When I have the same problem, I checked the speed of my site with 3 or 4 checkers. And. to my surprise, the speed given was different in all of them. So, I would recommend to use google tool and rely just on it. 
Wow, that tool is horrible. It forces you to sit through minutes of ads to see any result.
Alertra Website Monitoring Service (use the Spot Check)
Pingdom has a nice tool you can try. It breaks down the download for time for the different elements on the page so you can visually see what is slowing down the page.
I have not found Pindom’s speed to match up with Google’s reported speed though.
It does make you sit through ads for a short while but the results are pretty comprehensive and displayed well. I think it is worth the 30 secs of ads. Or just do something else for a couple of mins and go back.
Currently the website speed is an essential part in SE rankings. The faster your site the more points it gets to be ranked higher.
The speed test is 2 fold
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The response time from the server (you can check using http://www.examineurl.com)
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The page load time (you can check using http://tools.pingdom.com/fpt/)
To reduce the load time of your pages the most important factors will include
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Have a good hosting provider.
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Reduce the number of images / swf files on your page
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Use javascript to load images only when page focus is intiated.
I hope this helps,
Thank you