Hi Bert,

indeed, there is something strange going on when loading the two  
packages (Traits-al.214 and Kernel-al.109). Thanks for pointing that  
out.

On Mar 20, 2006, at 12:05 , Bert Freudenberg wrote:

[...]

> What would be needed to backport this speed-up to 3.8(.1)? How did  
> this change get into the system? Why wasn't it recorded in a  
> changeset?


The change is quite simple, for pre 3.9, the attached changeset  
should work (note, #category: duplicates the implementation in  
ClassDescription, hence should probably be removed there).

The actual trick is to implement #category as follows in Class:

category
	category ifNotNil: [
		((SystemOrganization listAtCategoryNamed: category) includes: self  
name)
			ifTrue: [ ^category ] ].
	category := super category.
	^category

It uses the ivar as a cache to make a guess (which is quite fast) and  
only falls back to the old, slow behavior of looking through the  
whole system category list if this fails.

The change in 3.9 does the same but also for the class Trait. To do  
this, there is a trait that is shared between Class and Trait. Latter  
additionally has a new ivar (Class had this already defined, but was  
not used, why?).


HTH,
Adrian
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