Hi,

Is this what you want? It works in 3.6, I don't know if it does on 3.7.

	(ParseNode classPool at: #StdSelectors)
		removeKey: #class
		ifAbsent: [ "nothing" ]

There is a minor loss of speed when patching the compiler like this, it 
takes for 10'000'000 calls of #class on my machine  6'103 ms, whereas 
before it took only 4'231 ms.

Regards,
Lukas

-- 
Lukas Renggli
http://renggli.freezope.org