User talk:Duyn/kd-tree Tutorial

Interesting work here. Personally I'd consider such a code-heavy tutorial to be more of a 'code-explanation' than a tutorial, but still very good. Also, pretty good job optimizing fairly well there :) --Rednaxela 16:07, 27 February 2010 (UTC)

Notice: Some performance discussion here moved to User talk:Duyn/BucketKdTree --Rednaxela 01:34, 3 March 2010 (UTC)

I think we should move discussion of performance to User:Duyn/BucketKdTree since it was more of a footnote in this walkthrough.—duyn 20:42, 2 March 2010 (UTC)

Good catch. Done :) --Rednaxela 01:34, 3 March 2010 (UTC)

Nice tutorial work here! Quick question: Did you measure the effect of using the variance for splitting? I tried that before (I think last week) and didn't seem to see a performance advantage. --Rednaxela 17:26, 12 March 2010 (UTC)

Not rigorously—I tried splitting half way along the widest dimension like you appear to do, but found that made search times worse.—duyn 18:02, 12 March 2010 (UTC)

Impressive speed with the final result there Duyn! I assume this is still comparing to the version of my tree in the old benchmark package? I'll have to compare it to my more up-to-date ones some time. That with the d-ary non-implicit tree also tempts me to to perhaps make a heap benchmark... :) --Rednaxela 19:13, 12 March 2010 (UTC)

Yes, it's with the old one bundled in the package. I wanted people to be able to replicate the results.—duyn 02:10, 13 March 2010 (UTC)

Well as far as replicating, just in case you missed it, KNN.jar here has since been updated (though maybe not worth downloading yet, I messed up the inclusion of source, it's there but a bit weird). I'll update KNN.jar again both fixed and with your latest tree versions included if you don't mind. --Rednaxela 02:17, 13 March 2010 (UTC)

Not at all.—duyn 06:20, 13 March 2010 (UTC)