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Re: A [TreeCtrl] bug [message #14608 is a reply to message #14595]

Tue, 04 March 2008 15:20

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

mrjt wrote on Tue, 04 March 2008 07:16

I believe this is because both key and value are Value types that may contain reference-counted objects (such as Image), and setting Null is required to decrement this count and (perhaps) free the memory. So setting Null is can be the cause of memory release.

Right on the spot... This is only minor optimization, but we want to consume as little memory as possible, right?

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But if this is the case then surely 'key = Null' should be added?

Definitely! It was added too.

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I admit it's unlikely that a reference counted object would be used as a Key

It is Value, so it is always reference counted... (I am considering to introduce "small value optimization", but numbers do not seem to match....)

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I could be wrong about all this though, my understanding of this aspect of Upp is somewhat limited.

Your understanding is near to perfect, as usual Wink

Mirek

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[Message index]

		A [TreeCtrl] bug By: huanghuan on Mon, 03 March 2008 07:56
		Re: A [TreeCtrl] bug By: mirek on Mon, 03 March 2008 19:17
		Re: A [TreeCtrl] bug By: huanghuan on Tue, 04 March 2008 11:52
		Re: A [TreeCtrl] bug By: mrjt on Tue, 04 March 2008 13:16
		Re: A [TreeCtrl] bug By: mirek on Tue, 04 March 2008 15:20
		Re: A [TreeCtrl] bug By: mr_ped on Tue, 04 March 2008 12:38
		Re: A [TreeCtrl] bug By: mrjt on Tue, 04 March 2008 13:01

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