CODEWITHSUNDEEP
apache-flexflex4flex3flash-builder
user1921386
user1921386

Reputation:

Flex 3 compatibility mode

I am working on a upgrade project where I am migrating from Flex 3 to Flex 4.

I want to ask about the difference between 'Flex 4' and 'Flex 4 with Flex 3 compatibility mode'. What are the pros and cons associated with them?

Is it better to do a full migration or a migration with compatibility mode?

Upvotes: 2

Views: 490

Answers (1)

Fred
Fred

Reputation: 26

I was pretty sure the only thing the Flash Builder "compatibility mode" checkbox does is use the Halo theme instead of the Spark theme

It's not only relative to the Halo theme but it regards all the Flex 4 features, style enhancement, per module singletons, spark features and so on, all these things are disabled in compatility mode, basicly, you run under Flex 3 features only.

I want to ask about the difference between 'Flex 4' and 'Flex 4 with Flex 3 compatibility mode'. What are the pros and cons associated with them?

Is it better to do a full migration or a migration with compatibility mode?

That really relies on performances, staying in Flex 3 will give you the best performances, in compatibility mode, you'll have much more better perfs than in Flex 4 but a bit less than in Flex 3, you'll also benefit of fixes, in Flex 4, you'll loose perfs, it's better to start a new app in Flex 4 rather than migrate one especialy if your app is complex.

Upvotes: 1

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