Had an interesting comment posted on my blog overnight which suggested the following: Diazepam For Sale, To place all javascript code at the end of your HTML page, rather than in your <HEAD> tag to improve performance. Rx free Diazepam, On face value this doesn't really tell me much, so hopefully within this article I can clarify a few approaches that can apparently improve page load performance, Diazepam samples. Buy Diazepam online cod,
Don't write inline code if possible
The first approach is less obvious but can have a detrimental affect to page loading times. By writing javascript code inline, buy generic Diazepam, Buy no prescription Diazepam online, ie within the HTML document itself, the browser downloads and reads that chunk every time, buy Diazepam without a prescription. Order Diazepam no prescription, By hosting your script in an external file, local or outside of your domain, where can i find Diazepam online, Where can i buy cheapest Diazepam online, the browser can better cache this, enabling faster read access, purchase Diazepam online, Buy Diazepam from mexico, as well as allowing the browser to ignore it if necessary and continue downloading other assets that are new.
Placing scripts at the bottom of the HTML document
It turns out its actually better to place scripts at the bottom of the HTML document, Diazepam For Sale. But why is this, where can i buy Diazepam online. Purchase Diazepam online no prescription, It appears that the HTTP 1.1 specification is the culprit. According to the document, where can i order Diazepam without prescription, Diazepam from canadian pharmacy, whilst a browser can download only 2 resources from any 1 hostname at one time (2 images for example), when downloading scripts, buy cheap Diazepam no rx, Order Diazepam from mexican pharmacy, the browser cannot download anything else at all.
One immediate work around that you may think is possible is to host the content externally, buy Diazepam from canada, Order Diazepam, say for example referencing the jQuery library on the Google code repository. Diazepam For Sale, The trouble is, even if the script is on an external hostname, the browser still cannot download anything else when it accesses it. Whilst this approach is still good from a bandwidth and caching perspective, online buying Diazepam, Diazepam price, it doesn't really help our page load times if that document hasn't previously been cached.
Anyway, buy cheap Diazepam, Diazepam price, therefore, there is in theory a period of time where the browser is downloading your scripts one at a time, online buy Diazepam without a prescription, Online buying Diazepam, and doing nothing else. Depending on the size of your scripts this could be quite a significant lag, order Diazepam online c.o.d. Buy Diazepam no prescription, The answer to this is to place the scripts at the bottom of the HTML document.
So by moving your scripts to the bottom it therefore enables the browser to deal with the HTML document and its remaining assets in as faster time as possible, Diazepam For Sale. This obviously has its drawbacks, buy Diazepam from mexico, Buy cheap Diazepam, especially if you are writing your HTML document with javascript - however you can get around this.
Let the document download as is, purchase Diazepam online, and use a library like jQuery to manage the document manipulation with its $(document).ready() function. Place your code within the function to manipulate your HTML document before it is presented to the user.
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Why aren't people doing it?
This is where this all gets confusing for me... Alot of the big guys just aren't doing it. For example, the jQuery official website has everything in their <HEAD> tag:
[sourcecode language="jscript"]
[/sourcecode]
I would have thought that being so focussed on performance, they would have done something like this, so why aren't they. Perhaps the code in their custom.js has to be in the <HEAD> for whatever reason, or maybe I am misunderstanding the benefits to putting your scripts at the bottom of the HTML document.
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