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Comparing Form Entry To Db On The Fly - Options?


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16 replies to this topic

#16 Randy

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Posted 29 May 2009 - 12:18 PM

Why is because a page won't finish loading until the javascript array has either loaded or timed out. 5,000 post codes x what 6 characters each in the UK = 30,000 characters that have to load before the page can complete.

If that were all that's on the page, probably not a biggie. But by the same token if the page is already filled with normal text characters and a couple of images, the array may end up being the proverbial straw that breaks the camels back.

It's something to be aware of and watch out for at least.

#17 1dmf

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Posted 29 May 2009 - 03:28 PM

Yeah but the beauty of AJAX means you can do things asyncronously which you would really like to do before page load wink1.gif

So yeah waiting for 5,000 postcodes to load into an array before the page is displayed would be a drag, but if you 'onload' them in the background; you grab them while the visitor is still analysing the page and wondering what their next course of action is going to be.

Hey it'll take em 30 seconds to fill the darn form in before they even get to the postcode field, plenty of time for AJAX to have grabbed the PAF (UK for Postal Address File) and wanged it into memory!




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