# Tuesday, 28 October 2003
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Whidbey was unveiled this morning. It has lots of nice new features, but I'm particularly interested in some of the improvements to reflection.

  • Finally, there is support for custom modifiers in Reflection.Emit
  • DynamicMethod allows methods to be generated that "implement" a delegate and the code gets garbage collected along with the delegate when it is no longer reachable.
  • There is (some) support for doing more of Reflection.Emit based on tokens (a token is an Int32 that refers to metadata in a module), instead of the more heavy weight MethodInfo/FieldInfo/etc. objects.
  • Reflection objects (e.g. MethodInfo) are now kept in a weak reference cache, so that they can be garbage collected if they aren't needed anymore.

I need to do some rewriting to take advantage of the last two, but once I do, the memory usage of IKVM should (hopefully) go down significantly. I'm not entirely sure that the changes they made are powerful enough, but it is an important step in the right direction.

I know I promised I wasn't going to move to Whidbey anytime soon, but I am going to introduce some conditional compilation for Whidbey specific features, so that I can play around with them. Mainstream development will continue to be on 1.1

Tuesday, 28 October 2003 21:23:21 (W. Europe Standard Time, UTC+01:00)  #    Comments [0]
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Anti-Spam Question: What method on java.lang.System returns an object's original hashcode (i.e. the one that would be returned by java.lang.Object.hashCode() if it wasn't overridden)? (case is significant)

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