Flex: Is it worth upgrading to Flex 4?

I'm in the process of building my first serious Flex application and have started out using Flex 3.4 even though 4.0 was available mainly due to the larger number of resources. But now I feel very comfortable with the Flex API's, is it worth upgrading to Flex 4?

What are the benefits? And can I expect much pain when porting my ex开发者_如何学Pythonisting code base of only a few thousand lines of code?

Cheers,

Chris

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Adobe has a useful article on upgrading from Flex 3 SDK to 4 as well as using the new IDE (Flash Builder) with the older SDKs (something which I have personally found useful as there are a couple of useful addons in the new Flash Builder).

http://www.adobe.com/devnet/flex/articles/flexbuilder3_to_flashbuilder4.html

As for whether it's "worth" upgrading depends very much on your project. Flex 4 offers a number of improvements, specifically in the presentation layer. Google for "flex 4 new features" and you'll find some Adobe posts which sum up the features nicely.

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From what I read the articles from adobe and others the newer version has much improved controls. So it is good always, considering the features.

Coming to upgrading part. I recommend you to read this first

http://www.adobe.com/devnet/flex/articles/flex3and4_differences.html

But let me warn you one thing.

I hired/tested few people to work on 4.0 who have experience in 3.0, I found them really struggle to get use to the 4.0. In my opinion it should not if you understood the changes completely.

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its not worth you can check some comparison in Google... maybe some other they will improve some features making it more sensible of migrating.