Hi. I have to say that I hate that the compiler associates a special bytecode for #class and that the VM don't even send the message. I want to be able to overwrite #class in a proxy for example, or to debug it.

I did some benchmarks disabling such optimization by doing:

�� (ParseNode classVarNamed:� 'StdSelectors') removeKey: #class ifAbsent: [].
�� Compiler recompileAll.
��
And the difference is NOTHING in my tests (maybe I am doing something wrong).

With Standard VM and #class� optimization

[SystemNavigation default allObjectsDo: [:each | each class]] timeToRun�� ->� aprox 50 miliseconds

With Standard VM and WITHOUT #class� optimization

[SystemNavigation default allObjectsDo: [:each | each class]] timeToRun�� ->� aprox 60 miliseconds

So...only 10 miliseconds more for asking the class to all the objects in the system.....(done in a PharoCore 1.3)

With Cog VM and #class� optimization

[SystemNavigation default allObjectsDo: [:each | each class]] timeToRun�� ->� aprox 13 miliseconds

With Cog VM and WITHOUT #class� optimization

[SystemNavigation default allObjectsDo: [:each | each class]] timeToRun�� ->� aprox 17 miliseconds

So...only 5 miliseconds more for asking the class to all the objects in the system.....(done in a PharoCore 1.3)

Considering (5 / 324535) asFloat� 0,000015406... of overhead

What do you think?

Mariano