Performance trouble with Processing jar
Hi All I'm writing graphic clojure code with Processing jars. When I wrote heavy draw code, I found clojure code is slower than an equivalent of java. Probably, the cause is java method call. I call processing drawing method thousands times per one frame. (.line applet x1 y1 z1 x2 y2 z2) So decrease the call count, increase draw performance. Do you know anything speed up way of java method call? I tied quil, but it was same performance. clojure version is 1.5.1 thanks -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Adding multiple entries in a vector with (something like) for.
Greetings,
I have a vector definition (containing maps), where a lot of them are very
similar.
eg.
[ :first
:second
{:name :third-1}
{:name :third-2}
]
I would like to use something like the following to replace the iterated
rows
(for [x (range 1 2)]
{:name (keyword (str third- x))})
The problem as that this creates a seq that gets put into the third spot in
the vector.
Time for a macro? (- Time to learn about macros)
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Re: Adding multiple entries in a vector with (something like) for.
How about using 'into'?
(into [:first :second] (for [x (range 1 5)] {:name (keyword (str third-
x))}))
Jozef
On Sat, Mar 29, 2014 at 9:25 AM, Paul Schulz pschul...@gmail.com wrote:
Greetings,
I have a vector definition (containing maps), where a lot of them are very
similar.
eg.
[ :first
:second
{:name :third-1}
{:name :third-2}
]
I would like to use something like the following to replace the iterated
rows
(for [x (range 1 2)]
{:name (keyword (str third- x))})
The problem as that this creates a seq that gets put into the third spot
in the vector.
Time for a macro? (- Time to learn about macros)
--
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Re: dependencies from github
Ray, David, Aaron, Phil, dgrnbrg: Understood. Thanks for clarifying my misunderstandings! On Thu, Mar 27, 2014 at 10:39 AM, dgrnbrg dsg123456...@gmail.com wrote: Voom is a Lein plugin that lets you depend on a repository and pins you to a specific commit. It also provides tools manage systems spanning multiple repos. You can find it here: https://github.com/LonoCloud/lein-voom and see the video from clojure/west here: https://m.youtube.com/watch?v=axztcYJUN4Ilist=PLZdCLR02grLp__wRg5OTavVj4wefg69hM -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Adding multiple entries in a vector with (something like) for.
Hi Jozef,
Thank you.
I was hoping for a syntax that I could use inside the structure (similarly
to the way that huccup supports embedded 'for' in HTML definitions).
On Saturday, 29 March 2014 19:53:06 UTC+10:30, Jozef Wagner wrote:
How about using 'into'?
(into [:first :second] (for [x (range 1 5)] {:name (keyword (str third-
x))}))
Jozef
On Sat, Mar 29, 2014 at 9:25 AM, Paul Schulz psch...@gmail.comjavascript:
wrote:
Greetings,
I have a vector definition (containing maps), where a lot of them are
very similar.
eg.
[ :first
:second
{:name :third-1}
{:name :third-2}
]
I would like to use something like the following to replace the iterated
rows
(for [x (range 1 2)]
{:name (keyword (str third- x))})
The problem as that this creates a seq that gets put into the third spot
in the vector.
Time for a macro? (- Time to learn about macros)
--
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Re: Error when starting REPL
Thx Niels, that works! 2014-03-29 0:46 GMT+01:00 Niels van Klaveren niels.vanklave...@gmail.com: Its a problem with writing to a temp folder. Run Ccw as admin, or take a look at the counterclockwise group for a solution that doesn't need that. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Adding multiple entries in a vector with (something like) for.
Well you can always abuse syntax quote :)
user= `[:first :second ~@(for [x (range 1 5)] {:name (keyword (str
third- x))})]
[:first :second {:name :third-1} {:name :third-2} {:name :third-3} {:name
:third-4}]
Jozef
On Sat, Mar 29, 2014 at 10:41 AM, Paul Schulz pschul...@gmail.com wrote:
Hi Jozef,
Thank you.
I was hoping for a syntax that I could use inside the structure (similarly
to the way that huccup supports embedded 'for' in HTML definitions).
On Saturday, 29 March 2014 19:53:06 UTC+10:30, Jozef Wagner wrote:
How about using 'into'?
(into [:first :second] (for [x (range 1 5)] {:name (keyword (str third-
x))}))
Jozef
On Sat, Mar 29, 2014 at 9:25 AM, Paul Schulz psch...@gmail.com wrote:
Greetings,
I have a vector definition (containing maps), where a lot of them are
very similar.
eg.
[ :first
:second
{:name :third-1}
{:name :third-2}
]
I would like to use something like the following to replace the iterated
rows
(for [x (range 1 2)]
{:name (keyword (str third- x))})
The problem as that this creates a seq that gets put into the third spot
in the vector.
Time for a macro? (- Time to learn about macros)
--
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Re: Adding multiple entries in a vector with (something like) for.
Ooo.. and Ah-ha! That's (almost) exactly what I was thinking of, and will
work very nicely.
I was thinking that I could just use a macro in the place of ~@ and somehow
avoid the initial quote.
Thank you..
On Saturday, 29 March 2014 20:20:57 UTC+10:30, Jozef Wagner wrote:
Well you can always abuse syntax quote :)
user= `[:first :second ~@(for [x (range 1 5)] {:name (keyword (str
third- x))})]
[:first :second {:name :third-1} {:name :third-2} {:name :third-3} {:name
:third-4}]
Jozef
On Sat, Mar 29, 2014 at 10:41 AM, Paul Schulz psch...@gmail.comjavascript:
wrote:
Hi Jozef,
Thank you.
I was hoping for a syntax that I could use inside the structure
(similarly to the way that huccup supports embedded 'for' in HTML
definitions).
On Saturday, 29 March 2014 19:53:06 UTC+10:30, Jozef Wagner wrote:
How about using 'into'?
(into [:first :second] (for [x (range 1 5)] {:name (keyword (str
third- x))}))
Jozef
On Sat, Mar 29, 2014 at 9:25 AM, Paul Schulz psch...@gmail.com wrote:
Greetings,
I have a vector definition (containing maps), where a lot of them are
very similar.
eg.
[ :first
:second
{:name :third-1}
{:name :third-2}
]
I would like to use something like the following to replace the
iterated rows
(for [x (range 1 2)]
{:name (keyword (str third- x))})
The problem as that this creates a seq that gets put into the third
spot in the vector.
Time for a macro? (- Time to learn about macros)
--
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probably a noobie question: apparent memory leak
I have some code that blows up the heap and I'm not sure why. I've reduced it down to the following. I've tried to make sure the atom doesn't have boundless growth and I didn't think 'while' hangs on to the head of sequences so I'm embarrassed to say I'm stumped. (defn leaks-memory [] (let [mem (atom []) chunksize 1000 threshold 2000] (while true (swap! mem conj (rand-int 100)) ; every 'chunksize' item past 'threshold' (when (and (= 0 (mod (count @mem) chunksize)) ( (count @mem) threshold)) (swap! mem subvec chunksize) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Performance trouble with Processing jar
Have you got type hints? If you do a java method call on something which isn't type hinted then clojure has to use reflection to look up a list of the available methods, which is slw. If however you tell it what type you expect it to be, it can better optimise it. So in the above code you would have something more like (defn draw [^Applet applet] (.line applet )) Look up how to turn on reflection warnings in your project and that will highlight all the lines which need attention. Hopefully it's as simple as that, but I would have expected quil to have type hints already, so possibly not... Adam Adam On Sat, Mar 29, 2014 at 6:20 AM, tamichan hogehogegeheg...@gmail.comwrote: Hi All I'm writing graphic clojure code with Processing jars. When I wrote heavy draw code, I found clojure code is slower than an equivalent of java. Probably, the cause is java method call. I call processing drawing method thousands times per one frame. (.line applet x1 y1 z1 x2 y2 z2) So decrease the call count, increase draw performance. Do you know anything speed up way of java method call? I tied quil, but it was same performance. clojure version is 1.5.1 thanks -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: probably a noobie question: apparent memory leak
On Sat, Mar 29, 2014 at 10:09 AM, Ryan Waters ryan.or...@gmail.com wrote: I have some code that blows up the heap and I'm not sure why. I've reduced it down to the following. I've tried to make sure the atom doesn't have boundless growth and I didn't think 'while' hangs on to the head of sequences so I'm embarrassed to say I'm stumped. (defn leaks-memory [] (let [mem (atom []) chunksize 1000 threshold 2000] (while true (swap! mem conj (rand-int 100)) ; every 'chunksize' item past 'threshold' (when (and (= 0 (mod (count @mem) chunksize)) ( (count @mem) threshold)) (swap! mem subvec chunksize) (doc subvec) Returns a persistent vector of the items in vector from start (inclusive) to end (exclusive). If end is not supplied, defaults to (count vector). This operation is O(1) and very fast, as the resulting vector shares structure with the original and no trimming is done. subvec is fast, but it's not saving you any memory. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Reuse of Java instances that have the same value
Hi all, maybe someone here can point me to the right direction. I have a large lookup tree (millions of entries), but the values in the leafs don't contain much information. That is, the number of unique values stored in leafs is rather small, same values are used over and over again. I load the tree from DB and create leaf values one by one as vectors. Clojure creates every time a new vector instance (e.g (= (java.lang.System/identityHashCode [1 2]) (java.lang.System/identityHashCode [1 2])) evaluates always to false) although most of the time there is no need for that because I already have it somewhere and could just reuse previous instance. I implemented that optimization manually and it works. The memory consumption dropped 20 times. My question is, that is there any way Clojure can do this optimization automatically (like Java handles strings for example)? Or are there any libraries, that can help to do that? Thank you in advance, -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: using contrib functions
defadt defines an algebraic data type - so, imagine a record with a finite number of implementations (Boolean is an algebraic data type since it only has true and false, for example. Chess pieces would be another one.) Once you define an ADT you can use that contrib library's match macro to do exhaustive case matches. Without the defadt thing, you just have to trust that the user knows how to handle all of your cases. Sean Corfield mailto:s...@corfield.org March 28, 2014 9:05 PM That's very out of date documentation. The current documentation is here: http://clojure.github.io/ The old monolithic clojure-contrib library hasn't been maintained for a very long time. Some parts of that library were migrated to the new modular contrib libraries. You can read more about that here: http://dev.clojure.org/display/community/Where+Did+Clojure.Contrib+Go The old clojure.contrib.types library was not one of those so it's essentially gone now. That usually means there are better ways to do what the old library did - or that the old library was never really a good way to do things in the first place. I've no idea what defadt was meant to do, I'm afraid. Sean Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) Christopher Howard mailto:cmhowa...@alaska.edu March 28, 2014 8:40 PM Hi. --Insert here the usual caveats about being new to Clojure and Java.-- I wanted to try out this Contrib function describe on this page http://richhickey.github.io/clojure-contrib/types-api.html#clojure.contrib.types/defadt. How do I get that in my project? Trying to follow documentation, I did lein search: code: my-host:~/my-project$ lein search contrib Warning: couldn't download index for http://repo1.maven.org/maven2 == Results from clojars - Showing page 1 / 1 total [webnf.deps/contrib 0.0.1] The uber dependency to get a full set of popular dependencies. For development or when you have room in your .m2 repo. my-host:~/my-project$ lein search clojure.contrib.types Warning: couldn't download index for http://repo1.maven.org/maven2 my-host:~/my-project$ lein search defadt Warning: couldn't download index for http://repo1.maven.org/maven2 Is that webnf package the thing I am supposed to put in my dependencies list? Version 0.0.1 doesn't sound right. Or am I supposed to download something myself and throw it in my lib directory? -- Sam Ritchie (@sritchie) Paddleguru Co-Founder 703.863.8561 www.paddleguru.com http://www.paddleguru.com/ Twitter http://twitter.com/paddleguru// Facebook http://facebook.com/paddleguru -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. inline: postbox-contact.jpginline: compose-unknown-contact.jpg
Re: java interop help for beginner calling java class
Did you move it to the corresponding directory structure? So, com.example.mystuff would need a directory hierarchy like com/example/mystuff. The mystuff directory is where you need to put your java files that are in the com.example.mystuff package. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: probably a noobie question: apparent memory leak
If you do a (count @mem) it reports the length of the atom's vector isn't growing without bounds. It seems counterintuitive that the parts of the old vector wouldn't get garbage collected because the atom no longer points to them. But I guess I need to rtfd. Thank you. On Sat, Mar 29, 2014 at 10:07 AM, Aaron Cohen aa...@assonance.org wrote: On Sat, Mar 29, 2014 at 10:09 AM, Ryan Waters ryan.or...@gmail.comwrote: I have some code that blows up the heap and I'm not sure why. I've reduced it down to the following. I've tried to make sure the atom doesn't have boundless growth and I didn't think 'while' hangs on to the head of sequences so I'm embarrassed to say I'm stumped. (defn leaks-memory [] (let [mem (atom []) chunksize 1000 threshold 2000] (while true (swap! mem conj (rand-int 100)) ; every 'chunksize' item past 'threshold' (when (and (= 0 (mod (count @mem) chunksize)) ( (count @mem) threshold)) (swap! mem subvec chunksize) (doc subvec) Returns a persistent vector of the items in vector from start (inclusive) to end (exclusive). If end is not supplied, defaults to (count vector). This operation is O(1) and very fast, as the resulting vector shares structure with the original and no trimming is done. subvec is fast, but it's not saving you any memory. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: using contrib functions
On Mar 29, 2014, at 9:39 AM, Sam Ritchie sritchi...@gmail.com wrote: defadt defines an algebraic data type - so, imagine a record with a finite number of implementations (Boolean is an algebraic data type since it only has true and false, for example. Chess pieces would be another one.) Once you define an ADT you can use that contrib library's match macro to do exhaustive case matches. Without the defadt thing, you just have to trust that the user knows how to handle all of your cases. Cool. That makes sense. I think that part of my 30+ years ago Comp Sci degree must be very rusty :) So what would be the modern Clojure way to implement ADTs... Sean Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) signature.asc Description: Message signed with OpenPGP using GPGMail
Re: probably a noobie question: apparent memory leak
You could give core.rrb-vector[1]. From the docs: The main API entry points are clojure.core.rrb-vector/catvec, performing vector concatenation, and clojure.core.rrb-vector/subvec, which produces a new vector containing the appropriate subrange of the input vector (in contrast to clojure.core/subvec, which returns a view on the input vector). [1] https://github.com/clojure/core.rrb-vector On Saturday, March 29, 2014 8:42:25 PM UTC+2, Ryan Waters wrote: If you do a (count @mem) it reports the length of the atom's vector isn't growing without bounds. It seems counterintuitive that the parts of the old vector wouldn't get garbage collected because the atom no longer points to them. But I guess I need to rtfd. Thank you. On Sat, Mar 29, 2014 at 10:07 AM, Aaron Cohen aa...@assonance.orgjavascript: wrote: On Sat, Mar 29, 2014 at 10:09 AM, Ryan Waters ryan@gmail.comjavascript: wrote: I have some code that blows up the heap and I'm not sure why. I've reduced it down to the following. I've tried to make sure the atom doesn't have boundless growth and I didn't think 'while' hangs on to the head of sequences so I'm embarrassed to say I'm stumped. (defn leaks-memory [] (let [mem (atom []) chunksize 1000 threshold 2000] (while true (swap! mem conj (rand-int 100)) ; every 'chunksize' item past 'threshold' (when (and (= 0 (mod (count @mem) chunksize)) ( (count @mem) threshold)) (swap! mem subvec chunksize) (doc subvec) Returns a persistent vector of the items in vector from start (inclusive) to end (exclusive). If end is not supplied, defaults to (count vector). This operation is O(1) and very fast, as the resulting vector shares structure with the original and no trimming is done. subvec is fast, but it's not saving you any memory. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.comjavascript: Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com javascript: For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+u...@googlegroups.com javascript:. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: probably a noobie question: apparent memory leak
Nice! I hadn't seen that before. Thank you both. On Sat, Mar 29, 2014 at 3:29 PM, Jonas jonas.enl...@gmail.com wrote: You could give core.rrb-vector[1]. From the docs: The main API entry points are clojure.core.rrb-vector/catvec, performing vector concatenation, and clojure.core.rrb-vector/subvec, which produces a new vector containing the appropriate subrange of the input vector (in contrast to clojure.core/subvec, which returns a view on the input vector). [1] https://github.com/clojure/core.rrb-vector On Saturday, March 29, 2014 8:42:25 PM UTC+2, Ryan Waters wrote: If you do a (count @mem) it reports the length of the atom's vector isn't growing without bounds. It seems counterintuitive that the parts of the old vector wouldn't get garbage collected because the atom no longer points to them. But I guess I need to rtfd. Thank you. On Sat, Mar 29, 2014 at 10:07 AM, Aaron Cohen aa...@assonance.orgwrote: On Sat, Mar 29, 2014 at 10:09 AM, Ryan Waters ryan@gmail.comwrote: I have some code that blows up the heap and I'm not sure why. I've reduced it down to the following. I've tried to make sure the atom doesn't have boundless growth and I didn't think 'while' hangs on to the head of sequences so I'm embarrassed to say I'm stumped. (defn leaks-memory [] (let [mem (atom []) chunksize 1000 threshold 2000] (while true (swap! mem conj (rand-int 100)) ; every 'chunksize' item past 'threshold' (when (and (= 0 (mod (count @mem) chunksize)) ( (count @mem) threshold)) (swap! mem subvec chunksize) (doc subvec) Returns a persistent vector of the items in vector from start (inclusive) to end (exclusive). If end is not supplied, defaults to (count vector). This operation is O(1) and very fast, as the resulting vector shares structure with the original and no trimming is done. subvec is fast, but it's not saving you any memory. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+u...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: test.check, quickcheck concurrency
Hi Brian, clojure.test.check does not currently ship with any concurrency support. That being said, I've been working an implementation on Erlang's PULSE, which I hope to have usable in the next couple months [1][2]. John's talk touches on using state machines to test concurrent code, which is something I'd like to attack eventually, but don't have any concrete plans at the moment. Reid [1] https://groups.google.com/forum/#!topic/clojure-dev/GhG-PbKW_ew [2] http://www.cse.chalmers.se/~nicsma/papers/finding-race-conditions.pdf On Friday, March 28, 2014 11:48:20 PM UTC-5, Brian Craft wrote: Re: John Hughes' talk at clojure/west, at the end he did a fairly incredible demo of testing concurrency. It doesn't look like this was implemented in test.check (or I'm not finding it). Are there any plans? -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: java interop help for beginner calling java class
Thanks I did not set the hierarchy I will give that a whirl Regards Bryan On Saturday, March 29, 2014 1:07:40 PM UTC-5, Chris Shellenbarger wrote: Did you move it to the corresponding directory structure? So, com.example.mystuff would need a directory hierarchy like com/example/mystuff. The mystuff directory is where you need to put your java files that are in the com.example.mystuff package. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Reuse of Java instances that have the same value
What about memoizing (clojure.core/memoize) the function that creates the leaves? - James On 29 March 2014 11:36, vte...@gmail.com wrote: Hi all, maybe someone here can point me to the right direction. I have a large lookup tree (millions of entries), but the values in the leafs don't contain much information. That is, the number of unique values stored in leafs is rather small, same values are used over and over again. I load the tree from DB and create leaf values one by one as vectors. Clojure creates every time a new vector instance (e.g (= (java.lang.System/identityHashCode [1 2]) (java.lang.System/identityHashCode [1 2])) evaluates always to false) although most of the time there is no need for that because I already have it somewhere and could just reuse previous instance. I implemented that optimization manually and it works. The memory consumption dropped 20 times. My question is, that is there any way Clojure can do this optimization automatically (like Java handles strings for example)? Or are there any libraries, that can help to do that? Thank you in advance, -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Performance trouble with Processing jar
Thanks Adam (def applet (new PApplet)) - (def ^PApplet (new PApplet)) results in amazing speed! And, quil certainly uses these type hints, sorry. In this trouble, I learned the principle of using type hints for much java method call. Ideally I wish clojure compiler may automatically add type when using (new ...). 2014年3月29日土曜日 23時28分29秒 UTC+9 Adam Clements: Have you got type hints? If you do a java method call on something which isn't type hinted then clojure has to use reflection to look up a list of the available methods, which is slw. If however you tell it what type you expect it to be, it can better optimise it. So in the above code you would have something more like (defn draw [^Applet applet] (.line applet )) Look up how to turn on reflection warnings in your project and that will highlight all the lines which need attention. Hopefully it's as simple as that, but I would have expected quil to have type hints already, so possibly not... Adam Adam On Sat, Mar 29, 2014 at 6:20 AM, tamichan hogehoge...@gmail.comjavascript: wrote: Hi All I'm writing graphic clojure code with Processing jars. When I wrote heavy draw code, I found clojure code is slower than an equivalent of java. Probably, the cause is java method call. I call processing drawing method thousands times per one frame. (.line applet x1 y1 z1 x2 y2 z2) So decrease the call count, increase draw performance. Do you know anything speed up way of java method call? I tied quil, but it was same performance. clojure version is 1.5.1 thanks -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.comjavascript: Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com javascript: For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+u...@googlegroups.com javascript:. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: STM and persistent data structures performance on mutli-core archs
Hi, So this is a follow-up. I claimed that 1 CPU core can saturate the memory but it turns out I was wrong, at least to some extend. Driven by curiosity I decided to do some measurements and test my somewhat older MBP 2.2GHz Inter Core i7. While it obviously all depends on the hardware, I thought it could be still a good test. In order to rule out the GC and JVM out of equation I went back to old good C and wrote a simple program which accesses a 40MB chunk of memory in both linear and random manner. All tests run a few times to ensure proper warm up and allocations within OS, however saw a great deal of consistency. It is not scientific by any means, but gives a rough idea what we are dealing with. Here are results where numbers are normalized gains. ++---++ | # of processes | random | linear| ++---++ |1 | 1.00| 1.00 | ++---++ |2 | 1.97| 1.76 | ++---++ |4 | 3.51| 1.83 | ++---++ |8 | 4.24| 1.86 | ++---++ The conclusion is that in practice two cores can easily saturate memory buses. Accessing it in certain patters helps to some extend. Although 8 cores is pretty much all what makes sense unless you do tons of in cache stuff. Best, Andy -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
