Comments on: Taming multidim Arrays http://clj-me.cgrand.net/2009/10/15/multidim-arrays/ When the pupil is ready to learn, a teacher will appear. Mon, 30 Jan 2012 20:57:36 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: cgrand http://clj-me.cgrand.net/2009/10/15/multidim-arrays/comment-page-1/#comment-1908 cgrand Sat, 01 Jan 2011 18:37:33 +0000 http://clj-me.cgrand.net/?p=153#comment-1908 @Sunil Try (deep-aset objects array-name i j (Complex. 10 20)). The hint passed to deep-aset is on the most deeply nested array -- that is an array of Complex instances, hence an array of objects. To be sure, can you call the class fn on a most deeply nested array? Or paste (eg on gist) more code to give me more context. @Sunil Try (deep-aset objects array-name i j (Complex. 10 20)). The hint passed to deep-aset is on the most deeply nested array — that is an array of Complex instances, hence an array of objects. To be sure, can you call the class fn on a most deeply nested array? Or paste (eg on gist) more code to give me more context.

]]> By: Sunil Nandihalli http://clj-me.cgrand.net/2009/10/15/multidim-arrays/comment-page-1/#comment-1839 Sunil Nandihalli Tue, 28 Dec 2010 10:23:00 +0000 http://clj-me.cgrand.net/?p=153#comment-1839 Hi Christopher, I have a defrecord defined as follows .. (defrecord Complex [^double i ^double r]) and I tried your deep-aset in the following way (deep-aset Complex array-name i j (Complex. 10 20)) I didn't see a significant improvement in speed like I saw in doubles when compared to the naive usage of aset... Is this expected? Sunil. Hi Christopher,
I have a defrecord defined as follows ..

(defrecord Complex [^double i ^double r])

and I tried your deep-aset in the following way

(deep-aset Complex array-name i j (Complex. 10 20))

I didn’t see a significant improvement in speed like I saw in doubles when compared to the naive usage of aset… Is this expected?

Sunil.

]]> By: cgrand http://clj-me.cgrand.net/2009/10/15/multidim-arrays/comment-page-1/#comment-370 cgrand Tue, 30 Mar 2010 16:37:03 +0000 http://clj-me.cgrand.net/?p=153#comment-370 @Sam Aaron: because the Clojure compiler inlines aget only for two args. Plus I fixed typehints propagation so, in 1.1, (-> #^objects dd #^doubles (aget i) (aget j)) simply works. @Sam Aaron: because the Clojure compiler inlines aget only for two args.
Plus I fixed typehints propagation so, in 1.1, (-> #^objects dd #^doubles (aget i) (aget j)) simply works.

]]> By: Sam Aaron http://clj-me.cgrand.net/2009/10/15/multidim-arrays/comment-page-1/#comment-369 Sam Aaron Tue, 30 Mar 2010 16:11:39 +0000 http://clj-me.cgrand.net/?p=153#comment-369 Out of interest, could you explain why the "Step-by-step (allow inlining)" reading approach twice as fast as the naive approach? Out of interest, could you explain why the “Step-by-step (allow inlining)” reading approach twice as fast as the naive approach?

]]> By: Functional Fluid Dynamics in Clojure | BEST IN CLASS http://clj-me.cgrand.net/2009/10/15/multidim-arrays/comment-page-1/#comment-365 Functional Fluid Dynamics in Clojure | BEST IN CLASS Mon, 29 Mar 2010 18:53:52 +0000 http://clj-me.cgrand.net/?p=153#comment-365 [...] as Christophe Grand points out in his fantastic blogpost on the matter, the Clojure compiler doesn’t support this type of reflection warning… yet. [...] [...] as Christophe Grand points out in his fantastic blogpost on the matter, the Clojure compiler doesn’t support this type of reflection warning… yet. [...]

]]> By: links for 2010-03-27 « Blarney Fellow http://clj-me.cgrand.net/2009/10/15/multidim-arrays/comment-page-1/#comment-360 links for 2010-03-27 « Blarney Fellow Sun, 28 Mar 2010 01:42:38 +0000 http://clj-me.cgrand.net/?p=153#comment-360 [...] Clojure and me » Taming multidim Arrays (tags: clojure array matrix optimization) [...] [...] Clojure and me » Taming multidim Arrays (tags: clojure array matrix optimization) [...]

]]> By: Clojure – Destillat #5 | duetsch.info - Open Source, Wet-, Web-, Software http://clj-me.cgrand.net/2009/10/15/multidim-arrays/comment-page-1/#comment-348 Clojure – Destillat #5 | duetsch.info - Open Source, Wet-, Web-, Software Tue, 16 Mar 2010 10:24:00 +0000 http://clj-me.cgrand.net/?p=153#comment-348 [...] Taming multidim Arrays [...] [...] Taming multidim Arrays [...]

]]> By: Brians Brain — Errata & Echoes « BEST IN CLASS http://clj-me.cgrand.net/2009/10/15/multidim-arrays/comment-page-1/#comment-152 Brians Brain — Errata & Echoes « BEST IN CLASS Sun, 25 Oct 2009 23:45:53 +0000 http://clj-me.cgrand.net/?p=153#comment-152 [...] tried to tap directly into Javas Arrays following the great performance boosting tips found: here. But it still gave me about 200 msecs on an 80x80 board. I then tried to reduce it to a [...] [...] tried to tap directly into Javas Arrays following the great performance boosting tips found: here. But it still gave me about 200 msecs on an 80×80 board. I then tried to reduce it to a [...]

]]>