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Groups > comp.lang.java.programmer > #3787 > unrolled thread

JNA performance

Started by"Qu0ll" <Qu0llSixFour@gmail.com>
First post2011-05-08 15:35 +1000
Last post2011-05-09 08:54 -0600
Articles 20 on this page of 39 — 12 participants

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Contents

  JNA performance "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-05-08 15:35 +1000
    Re: JNA performance Knute Johnson <nospam@knutejohnson.com> - 2011-05-07 22:48 -0700
      Re: JNA performance "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-05-08 16:03 +1000
        Re: JNA performance Knute Johnson <nospam@knutejohnson.com> - 2011-05-08 09:54 -0700
      Re: JNA performance Steve Sobol <sjsobol@JustThe.net> - 2011-05-08 13:26 -0700
        Re: JNA performance "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-05-09 08:44 +1000
          Re: JNA performance Jeff Higgins <jeff@invalid.invalid> - 2011-05-08 21:17 -0400
          Re: JNA performance Jeff Higgins <jeff@invalid.invalid> - 2011-05-08 21:20 -0400
            Re: JNA performance Jeff Higgins <jeff@invalid.invalid> - 2011-05-08 21:24 -0400
              Re: JNA performance "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-05-09 13:39 +1000
                Re: JNA performance Steve Sobol <sjsobol@JustThe.net> - 2011-05-08 21:54 -0700
                  Re: JNA performance "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-05-09 15:47 +1000
                    Re: JNA performance Steve Sobol <sjsobol@JustThe.net> - 2011-05-08 23:26 -0700
                      Re: JNA performance "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-05-09 17:07 +1000
                  Re: JNA performance Steve Sobol <sjsobol@JustThe.net> - 2011-05-10 12:44 -0700
          Re: JNA performance Tom Anderson <twic@urchin.earth.li> - 2011-05-09 18:21 +0100
            Re: JNA performance Steve Sobol <sjsobol@JustThe.net> - 2011-05-09 13:05 -0700
              Re: JNA performance Tom Anderson <twic@urchin.earth.li> - 2011-05-09 21:09 +0100
                Re: JNA performance Steve Sobol <sjsobol@JustThe.net> - 2011-05-09 17:58 -0700
    Re: JNA performance Roedy Green <see_website@mindprod.com.invalid> - 2011-05-07 23:25 -0700
      Re: JNA performance "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-05-08 16:32 +1000
      Re: JNA performance Steve Sobol <sjsobol@JustThe.net> - 2011-05-08 13:27 -0700
    Re: JNA performance Lew <noone@lewscanon.com> - 2011-05-08 07:58 -0400
      Re: JNA performance Roedy Green <see_website@mindprod.com.invalid> - 2011-05-08 19:17 -0700
        Re: JNA performance Lew <noone@lewscanon.com> - 2011-05-09 08:36 -0400
          Re: JNA performance Roedy Green <see_website@mindprod.com.invalid> - 2011-05-09 06:34 -0700
            Re: JNA performance Lew <noone@lewscanon.com> - 2011-05-09 09:57 -0400
    O/T: Tag lines, or sigs (Was: JNA performance) Lew <noone@lewscanon.com> - 2011-05-08 08:02 -0400
      Re: O/T: Tag lines, or sigs (Was: JNA performance) Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-05-08 11:24 -0300
        Re: O/T: Tag lines, or sigs (Was: JNA performance) Lew <noone@lewscanon.com> - 2011-05-08 12:35 -0400
          Re: O/T: Tag lines, or sigs (Was: JNA performance) Knute Johnson <nospam@knutejohnson.com> - 2011-05-08 09:54 -0700
        Re: Tag lines, or sigs (Was: JNA performance) "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-05-09 03:37 +1000
        Re: O/T: Tag lines, or sigs (Was: JNA performance) Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-05-09 15:50 +1200
          Re: O/T: Tag lines, or sigs (Was: JNA performance) Lew <noone@lewscanon.com> - 2011-05-09 08:36 -0400
      Re: O/T: Tag lines, or sigs (Was: JNA performance) "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-05-09 03:37 +1000
        Re: O/T: Tag lines, or sigs (Was: JNA performance) Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2011-05-08 19:55 +0200
          Re: O/T: Tag lines, or sigs (Was: JNA performance) Martin Gregorie <martin@address-in-sig.invalid> - 2011-05-08 19:30 +0000
            Re: O/T: Tag lines, or sigs (Was: JNA performance) Steve Sobol <sjsobol@JustThe.net> - 2011-05-08 13:28 -0700
    Re: JNA performance Jim Janney <jjanney@shell.xmission.com> - 2011-05-09 08:54 -0600

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#3787 — JNA performance

From"Qu0ll" <Qu0llSixFour@gmail.com>
Date2011-05-08 15:35 +1000
SubjectJNA performance
Message-ID<tqmdnUiqqro_tlvQnZ2dnUVZ_tmdnZ2d@westnet.com.au>
I am about to do some Java programming involving native libraries so can 
anyone comment on their experiences with the performance of JNA?  I note the 
following (somewhat concerning) statement from the JNA website:

"While some attention is paid to performance, correctness and ease of use 
take priority."

I guess there's little point in using it if it sucks performance-wise even 
if it is "easy to use"!  I have never used JNI either but it looks not so 
"easy to use" (i.e. requires some C programming).

And loving it,

-Qu0ll (Rare, not extinct)
_________________________________________________
Qu0llSixFour@gmail.com
[Replace the "SixFour" with numbers to email me]

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#3789

FromKnute Johnson <nospam@knutejohnson.com>
Date2011-05-07 22:48 -0700
Message-ID<t8qxp.16483$_P6.1037@newsfe05.iad>
In reply to#3787
On 05/07/2011 10:35 PM, Qu0ll wrote:
> I am about to do some Java programming involving native libraries so can
> anyone comment on their experiences with the performance of JNA? I note
> the following (somewhat concerning) statement from the JNA website:
>
> "While some attention is paid to performance, correctness and ease of
> use take priority."
>
> I guess there's little point in using it if it sucks performance-wise
> even if it is "easy to use"! I have never used JNI either but it looks
> not so "easy to use" (i.e. requires some C programming).
>
> And loving it,
>
> -Qu0ll (Rare, not extinct)

I've not used JNA, JNI a little and a long time ago.  JNA looks easier 
to use.

Just curious what you are going to use the JNA for?

Thanks,

-- 

Knute Johnson
s/knute/nospam/

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#3790

From"Qu0ll" <Qu0llSixFour@gmail.com>
Date2011-05-08 16:03 +1000
Message-ID<95adncOiLJ3Er1vQnZ2dnUVZ_sudnZ2d@westnet.com.au>
In reply to#3789
"Knute Johnson"  wrote in message news:t8qxp.16483$_P6.1037@newsfe05.iad...

<snip>

> I've not used JNA, JNI a little and a long time ago.  JNA looks easier to 
> use.
>
> Just curious what you are going to use the JNA for?

I am going to use it to access a native font rendering engine such as 
FreeType for use in an OpenGL (JOGL or LWJGL) application.

And loving it,

-Qu0ll (Rare, not extinct)
_________________________________________________
Qu0llSixFour@gmail.com
[Replace the "SixFour" with numbers to email me]

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#3818

FromKnute Johnson <nospam@knutejohnson.com>
Date2011-05-08 09:54 -0700
Message-ID<tVzxp.28305$vC5.15383@newsfe01.iad>
In reply to#3790
On 05/07/2011 11:03 PM, Qu0ll wrote:
> "Knute Johnson" wrote in message news:t8qxp.16483$_P6.1037@newsfe05.iad...
>
> <snip>
>
>> I've not used JNA, JNI a little and a long time ago. JNA looks easier
>> to use.
>>
>> Just curious what you are going to use the JNA for?
>
> I am going to use it to access a native font rendering engine such as
> FreeType for use in an OpenGL (JOGL or LWJGL) application.
>
> And loving it,
>
> -Qu0ll (Rare, not extinct)
> _________________________________________________
> Qu0llSixFour@gmail.com
> [Replace the "SixFour" with numbers to email me]

Thanks.

-- 

Knute Johnson
s/knute/nospam/

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#3825

FromSteve Sobol <sjsobol@JustThe.net>
Date2011-05-08 13:26 -0700
Message-ID<MPG.28309c4e432cd5be989735@news.justthe.net>
In reply to#3789
In article <t8qxp.16483$_P6.1037@newsfe05.iad>, Knute Johnson says...


> I've not used JNA, JNI a little and a long time ago.  JNA looks easier 
> to use.

JNA is *unquestionably* easier to use. I've used both. Now I only use 
JNI's Invocation Interface on projects where I need to attach a JVM to a 
native thread.

If I need to call a native library, I use JNA.

-- 
Steve Sobol - Programming/WebDev/IT Support
sjsobol@JustThe.net

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#3829

From"Qu0ll" <Qu0llSixFour@gmail.com>
Date2011-05-09 08:44 +1000
Message-ID<foidnSco_dBNgVrQnZ2dnUVZ_jCdnZ2d@westnet.com.au>
In reply to#3825
"Steve Sobol"  wrote in message 
news:MPG.28309c4e432cd5be989735@news.justthe.net...

> JNA is *unquestionably* easier to use. I've used both. Now I only use
> JNI's Invocation Interface on projects where I need to attach a JVM to a
> native thread.
>
> If I need to call a native library, I use JNA.

Great, you wouldn't happen to know how to do download it would you?  The 
website appears to be broken wrt downloads.  I'd report it on their mailing 
list except that link is err... broken.

-- 
And loving it,

-Qu0ll (Rare, not extinct)
_________________________________________________
Qu0llSixFour@gmail.com
[Replace the "SixFour" with numbers to email me]

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#3831

FromJeff Higgins <jeff@invalid.invalid>
Date2011-05-08 21:17 -0400
Message-ID<iq7f7f$jvf$1@dont-email.me>
In reply to#3829
On 05/08/2011 06:44 PM, Qu0ll wrote:
>
> Great, you wouldn't happen to know how to do download it would you? The
> website appears to be broken wrt downloads. I'd report it on their
> mailing list except that link is err... broken.
>

svn co https://svn.java.net/svn/jna~svn/trunk

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#3832

FromJeff Higgins <jeff@invalid.invalid>
Date2011-05-08 21:20 -0400
Message-ID<iq7fco$jvf$2@dont-email.me>
In reply to#3829
On 05/08/2011 06:44 PM, Qu0ll wrote:
>
> Great, you wouldn't happen to know how to do download it would you? The
> website appears to be broken wrt downloads. I'd report it on their
> mailing list except that link is err... broken.
>

svn co https://svn.java.net/svn/jna~svn/trunk

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#3833

FromJeff Higgins <jeff@invalid.invalid>
Date2011-05-08 21:24 -0400
Message-ID<iq7fl6$9d6$1@dont-email.me>
In reply to#3832
On 05/08/2011 09:20 PM, Jeff Higgins wrote:
> On 05/08/2011 06:44 PM, Qu0ll wrote:
>>
>> Great, you wouldn't happen to know how to do download it would you? The
>> website appears to be broken wrt downloads. I'd report it on their
>> mailing list except that link is err... broken.
>>
>
> svn co https://svn.java.net/svn/jna~svn/trunk
>
>
>
Oops. svn co https://svn.java.net/svn/jna~svn/trunk/jnalib

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#3837

From"Qu0ll" <Qu0llSixFour@gmail.com>
Date2011-05-09 13:39 +1000
Message-ID<DbSdnR0rofql_1rQnZ2dnUVZ_hKdnZ2d@westnet.com.au>
In reply to#3833
"Jeff Higgins"  wrote in message news:iq7fl6$9d6$1@dont-email.me... 

> Oops. svn co https://svn.java.net/svn/jna~svn/trunk/jnalib

Cool, thanks.

-- 
And loving it,

-Qu0ll (Rare, not extinct)
_________________________________________________
Qu0llSixFour@gmail.com
[Replace the "SixFour" with numbers to email me]

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#3840

FromSteve Sobol <sjsobol@JustThe.net>
Date2011-05-08 21:54 -0700
Message-ID<MPG.283113662e01227f989739@news.justthe.net>
In reply to#3837
In article <DbSdnR0rofql_1rQnZ2dnUVZ_hKdnZ2d@westnet.com.au>, Qu0ll 
says...
> 
> "Jeff Higgins"  wrote in message news:iq7fl6$9d6$1@dont-email.me... 
> 
> > Oops. svn co https://svn.java.net/svn/jna~svn/trunk/jnalib
> 
> Cool, thanks.

I need to see if I can dig up an email address for the maintainer. Looks 
like the site may not have survived the Great Java.net Migration.

-- 
Steve Sobol - Programming/WebDev/IT Support
sjsobol@JustThe.net

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#3842

From"Qu0ll" <Qu0llSixFour@gmail.com>
Date2011-05-09 15:47 +1000
Message-ID<Ma-dneZ5ANCTHVrQnZ2dnUVZ_qKdnZ2d@westnet.com.au>
In reply to#3840
"Steve Sobol"  wrote in message 
news:MPG.283113662e01227f989739@news.justthe.net...

> I need to see if I can dig up an email address for the maintainer. Looks
> like the site may not have survived the Great Java.net Migration.

That would be nice!  I tried to email the maintainer using their java.net ID 
which translated to todd.fast@sun.com which is broken.

-- 
And loving it,

-Qu0ll (Rare, not extinct)
_________________________________________________
Qu0llSixFour@gmail.com
[Replace the "SixFour" with numbers to email me]

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#3843

FromSteve Sobol <sjsobol@JustThe.net>
Date2011-05-08 23:26 -0700
Message-ID<MPG.283128ebd5b03f0698973a@news.justthe.net>
In reply to#3842
In article <Ma-dneZ5ANCTHVrQnZ2dnUVZ_qKdnZ2d@westnet.com.au>, Qu0ll 
says...
> 
> "Steve Sobol"  wrote in message 
> news:MPG.283113662e01227f989739@news.justthe.net...
> 
> > I need to see if I can dig up an email address for the maintainer. Looks
> > like the site may not have survived the Great Java.net Migration.
> 
> That would be nice!  I tried to email the maintainer using their java.net ID 
> which translated to todd.fast@sun.com which is broken.

mmm? I don't remember the name of the maintainer, but that's not it. 
Anyhow, I used the "feedback" link to report the problem; hopefully it 
will be fixed soon.

And FYI, you don't use JNA for performance reasons; it's a shim on top 
of JNI. You use it because it's much easier and cleaner than using plain 
JNI. :)

-- 
Steve Sobol - Programming/WebDev/IT Support
sjsobol@JustThe.net

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#3844

From"Qu0ll" <Qu0llSixFour@gmail.com>
Date2011-05-09 17:07 +1000
Message-ID<Z9ednQ0Iwew1D1rQnZ2dnUVZ_tOdnZ2d@westnet.com.au>
In reply to#3843
"Steve Sobol"  wrote in message 
news:MPG.283128ebd5b03f0698973a@news.justthe.net...

> mmm? I don't remember the name of the maintainer, but that's not it.
> Anyhow, I used the "feedback" link to report the problem; hopefully it
> will be fixed soon.

Thanks for that.

> And FYI, you don't use JNA for performance reasons; it's a shim on top
> of JNI. You use it because it's much easier and cleaner than using plain
> JNI. :)

Yes, I realise that.  My point was that I hope convenience doesn't come at 
the cost of reasonable performance.

-- 
And loving it,

-Qu0ll (Rare, not extinct)
_________________________________________________
Qu0llSixFour@gmail.com
[Replace the "SixFour" with numbers to email me]

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#3936

FromSteve Sobol <sjsobol@JustThe.net>
Date2011-05-10 12:44 -0700
Message-ID<MPG.283335675be275f898973d@news.justthe.net>
In reply to#3840
In article <MPG.283113662e01227f989739@news.justthe.net>, Steve Sobol 
says...
> 
> In article <DbSdnR0rofql_1rQnZ2dnUVZ_hKdnZ2d@westnet.com.au>, Qu0ll 
> says...
> > 
> > "Jeff Higgins"  wrote in message news:iq7fl6$9d6$1@dont-email.me... 
> > 
> > > Oops. svn co https://svn.java.net/svn/jna~svn/trunk/jnalib
> > 
> > Cool, thanks.
> 
> I need to see if I can dig up an email address for the maintainer. Looks 
> like the site may not have survived the Great Java.net Migration.

I have been informed, by someone at java.net, that the JNA downloads can 
be found at http://java.net/downloads/jna/ - of course, that isn't where 
the link goes, so I also asked when they are going to fix the link. Have 
not received a response to that question... yet.


-- 
Steve Sobol - Programming/WebDev/IT Support
sjsobol@JustThe.net

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#3865

FromTom Anderson <twic@urchin.earth.li>
Date2011-05-09 18:21 +0100
Message-ID<alpine.DEB.2.00.1105091821220.18864@urchin.earth.li>
In reply to#3829
On Mon, 9 May 2011, Qu0ll wrote:

> "Steve Sobol"  wrote in message 
> news:MPG.28309c4e432cd5be989735@news.justthe.net...
>
>> JNA is *unquestionably* easier to use. I've used both. Now I only use 
>> JNI's Invocation Interface on projects where I need to attach a JVM to 
>> a native thread.
>> 
>> If I need to call a native library, I use JNA.
>
> Great, you wouldn't happen to know how to do download it would you?

sudo yum install jna

What?

tom

-- 
It is a formal cultural policy to show unreasonable bias towards any
woman who is both attractive and weird.

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#3872

FromSteve Sobol <sjsobol@JustThe.net>
Date2011-05-09 13:05 -0700
Message-ID<MPG.2831e90044316c1d98973b@news.justthe.net>
In reply to#3865
In article <alpine.DEB.2.00.1105091821220.18864@urchin.earth.li>, Tom 
Anderson says...

> > Great, you wouldn't happen to know how to do download it would you?
> 
> sudo yum install jna

Great. Let me try that on my Windows laptop. Does an RPM package even 
exists for JNA?

> What?

Indeed.



-- 
Steve Sobol - Programming/WebDev/IT Support
sjsobol@JustThe.net

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#3873

FromTom Anderson <twic@urchin.earth.li>
Date2011-05-09 21:09 +0100
Message-ID<alpine.DEB.2.00.1105092107070.24657@urchin.earth.li>
In reply to#3872
On Mon, 9 May 2011, Steve Sobol wrote:

> In article <alpine.DEB.2.00.1105091821220.18864@urchin.earth.li>, Tom
> Anderson says...
>
>>> Great, you wouldn't happen to know how to do download it would you?
>>
>> sudo yum install jna
>
> Great. Let me try that on my Windows laptop.

Oh, well if you have Windows, there's a certain other piece of software 
you'll need to install first :).

> Does an RPM package even exists for JNA?

Yes, and it's called jna! There's an impressive range of Java stuff in the 
Fedora repositories; given that the Java world tends to have its own ways 
of doing dependency management (whether Maven or just shipping zips of 
jars), i find this a little surprising, but it's certainly convenient.

tom

-- 
So the moon is approximately 24 toasters from Scunthorpe.

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#3884

FromSteve Sobol <sjsobol@JustThe.net>
Date2011-05-09 17:58 -0700
Message-ID<MPG.28322da530920e398973c@news.justthe.net>
In reply to#3873
In article <alpine.DEB.2.00.1105092107070.24657@urchin.earth.li>, Tom 
Anderson says...

> >> sudo yum install jna
> >
> > Great. Let me try that on my Windows laptop.
> 
> Oh, well if you have Windows, there's a certain other piece of software 
> you'll need to install first :).
> 
> > Does an RPM package even exists for JNA?
> 
> Yes, and it's called jna!

Well, that's impressive! :) 

> There's an impressive range of Java stuff in the 
> Fedora repositories; given that the Java world tends to have its own ways 
> of doing dependency management (whether Maven or just shipping zips of 
> jars), i find this a little surprising, but it's certainly convenient.

Maven manages build dependencies, more than runtime dependencies, IMHO, 
but I do agree with your statement (in general).



-- 
Steve Sobol - Programming/WebDev/IT Support
sjsobol@JustThe.net

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#3791

FromRoedy Green <see_website@mindprod.com.invalid>
Date2011-05-07 23:25 -0700
Message-ID<qmdcs6hrgicldcrr8sa3irkr3n1me4vaon@4ax.com>
In reply to#3787
On Sun, 8 May 2011 15:35:08 +1000, "Qu0ll" <Qu0llSixFour@gmail.com>
wrote, quoted or indirectly quoted someone who said :

>I am about to do some Java programming involving native libraries so can 
>anyone comment on their experiences with the performance of JNA?  I note the 
>following (somewhat concerning) statement from the JNA website:

I presume you mean JNI not JNA.

The problem with JNI is the overhead of calling a JNI method is very
high.  What you save by writing machine code or C you lose by the
extra overhead of the call.

You have to do a fair chunk of work on the C side to make it pay. Most
often it is used to tie into a well-written legacy library.

See http://mindprod.com/jgloss/jni.html
-- 
Roedy Green Canadian Mind Products
http://mindprod.com
How long did it take after the car was invented before owners understood 
cars would not work unless you regularly changed the oil and the tires?
We have gone 33 years and still it is rare to uncover a user who 
understands computers don't work without regular backups.

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