Smalltalk - [VW 7.1] isNil ifTrue:versus ifNil:

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[VW 7.1] isNil ifTrue:versus ifNil:

Andre Schnoor

2004-06-15, 8:57 am

I experienced that
anObject isNil ifTrue:[ ... ]

is a lot faster than
anObject ifNil:[ ... ]

How comes? I'm now busy rewriting all occurences of #ifNil: (as well as
#ifNotNil:) in my app. I first thought it was the other way around and
started using ifNil: whenever possible. It seemed to me one execution step
was ommited. But it seems the compiler optimization of #ifTrue: does a great
job.

Am I doing the right thing?

Andre

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