Execution Speed of Aurora JRE

We are experiencing some problems with the execution speed of the aurora JRE. The documentation states that the Aurora JRE is compiled to native code and should run 2 - 10 times faster than a normal JRE. We are atempting to do some memory sorts using the Array class which is taking 10 times longer in the Oracle instance than on a client.
Is this a known performance bottleneck, are there any "tweaks" available?
Thanks
Julian

Hello Ravi,
Does your statement about core java classes being natively compiled also apply to the JVM in OAS / iAS?
I remember reading in a white paper that, in iAS, java code would be translated into C code for native execution. Does this apply to user code or only core java classes ?
(by the way, It seems impossible to download OAS 4.0.8.2 from OTN, maybe it would help if it was divided into several smaller files...)
Thanks, Remi DEH
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Oracle Support Analyst (Ravi):
In the current JServer release, Java code you load to the server is
interpreted. The underlying core classes upon which your code relies (java.lang.*) are natively compiled. Until the native compiler is available for user programs,
the net speed benefit of native compilation to your executing program is dependent upon how much native code is traversed, as opposed to interpreted code. The
more Java code from core classes and Oracle-provided class libraries you use, the more benefit you will see from native compilation.
In 8.1.7 i.e 8i Release 3 we support natively compiled code for the user programs.
<HR></BLOCKQUOTE>
null

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Good questions!
Starting from the bottom:
Iis there any benefit to hiding unused front panel objects?
Is there a way to create a local without front panel object?
No and No. Local variables are generally a poor way to store and move data. For the reasons you cited (FP object you do not want or need, hidden FP objects) and that they force a copy of the data and may cause a thread switch to the UI thread.
Finally, with a tabbed UI, are objects on the non active tabs being redrawn and slowing the process?
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Search for Ben's extremely informative Nugget on Action Engines (AE). An Action Engine is a FGV with added capabilities. It may be a very good option for what you are trying to do. It could store all the data sets, update the graphs, and make the data available where it may be needed without extra copies. With the AE you could easily acquire and store data at one rate and update the graphs at a (slower) rate appropriate to the users eyes and brains. Updating graphs more than ~10 times per second is a waste of resources because the user cannot respond any faster than that. Also you could write a subset or reduced data set to the graph if the amount of data is larger than the number of pixels in the plot.
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| 0 | SELECT STATEMENT | | | | |
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>
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>
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AAAAAAAAAAAAA
AAAAAAAAAAAAA
AAAAAAAAAAAAA
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AAAAAAAAAAAAA
AAAAAAAAAAAAA
AAAAAAAAAAAAA
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Attachments:
adc-gpbuffer.vi ‏165 KB

Javier,
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Thanks Guys, You comments are really encouraging.
I agree Java is great!
My question really is put better this way:
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The Execution speed of finished Java programs is slow and often does require much memory? Why is
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Depends on what kind of application it is, where you want the speed increase, and whether you can pay for it with additional memory usage.
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Edited by: Liang Ji on Mar 29, 2008 5:42 AM

File read write affect my execution speed..

Hi friends,
I am facing one problem regarding excel tab file.thats i have one instrument its generates the 100 data in one minute which data is needed to log in Excel tab file.
In this case i need to display the serial no of each data,so the i am reading the file each time and increament it and store as next serila no.its not given the problem when file size is less.but afterward when file size is increased ,its take much time to read the file.so my execution time is mostly impacted or spoiled..i developed as a queue based produce costumer architecture even i get it ,
and onething i dont have obtion to use any other file type except excel tab type.
pls if u have the solution Telll me
Raj

thanks for reply
if i do append in excel .i cannot realize what s.no is given before...so that pupose only i need to read the data to get the last S.no.
your answer is correct only if i enable the append option.its work fastly.....but this situation i cant make append the data..i need to know already stored data like "S.NO"
Raj
Attachments:
code.png ‏162 KB

Execution Speed of Aurora JRE

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