Making it more efficient

I will be using this function
               private function inter_1a(evt:MouseEvent):void {
                var popUpInterDisplay:interactionexporter;
                popUpInterDisplay = new interactionexporter();
                popUpInterDisplay.source = "lessons/lessonone/interactions/inter1a.swf";
                PopUpManager.addPopUp(popUpInterDisplay, this, true);
But will use it at least 30 times. For example:
               private function inter_1b(evt:MouseEvent):void {
                var popUpInterDisplay:interactionexporter;
                popUpInterDisplay = new interactionexporter();
                popUpInterDisplay.source = "lessons/lessonone/interactions/inter1b.swf";
                PopUpManager.addPopUp(popUpInterDisplay, this, true);
           private function inter_1c(evt:MouseEvent):void {
                 var popUpInterDisplay:interactionexporter;
                 popUpInterDisplay = new interactionexporter();
                 popUpInterDisplay.source = "lessons/lessonone/interactions/inter1c.swf";
                 PopUpManager.addPopUp(popUpInterDisplay, this, true);
    ETC......
Any ideas as to make this more efficient?
Thanks

This can be written more efficient indeed. How are these functions called, by Buttons or by an item in a datagrid?
In case it are buttons, you can store the name of the swf in their id properties:
private function inter(evt:MouseEvent):void
      var popUpInterDisplay:interactionexporter = new interactionexporter();
      popUpInterDisplay.source = "lessons/lessonone/interactions/" + evt.target.id + ".swf";
      PopUpManager.addPopUp(popUpInterDisplay, this, true);
In case of a datagrid, you can use a property of the selectedItem:
private function inter(evt:MouseEvent):void
       var popUpInterDisplay:interactionexporter = new interactionexporter();
       popUpInterDisplay.source = "lessons/lessonone/interactions/" + evt.currentTarget.selectedItem.propName + ".swf";
       PopUpManager.addPopUp(popUpInterDisplay, this, true);
Dany

Similar Messages

Making code more efficient

I am having a lot of trouble getting my code to work fast enough. I have 4 sonic anemometers and currently my code is only efficient enough to collect data from one. I have programs that run 2 sonic anemometers and save the data, but bites pile up at the port. The instruments are in unprompted mode and send data at 10hz. I find that using the wait command dose not work well for some reason so I have the loop continuously running. The first version of my code (V3a) worked for one sonic and bites did not pile up at the port. So I made (V3b) and tried to make a more efficient program. I tried separating things into multiple loops but, it still does not work well and was hoping to get some ideas to make things work better.
I attached the 2 versions of my code. I am not sure if I should attach the subVIs, let me know.
Thanks!
Attachments:
fo3csat_unprompted_v3a.vi ‏23 KB
fo3csat_unprompted_v3b.vi ‏27 KB

I'm going to ask you a very important question about that occurrence in the top loop: by using the occurrence the way you have, have you eliminated the possibility of a race condition? The answer is NO... study it, and you'll see why. If you can't figure it out, post back and I'll tell you why the race condition is still present.
Also, if you ever are coding and thinking to yourself, "WOW, I can't believe the guys who developed LabVIEW made it so hard to do this simple task!", odds are, you're making it hard yourself! Rather than making 4 parallel branches of a numeric, converting to an ASCII string, then reinterpreting as 4 separate numerics, consider the following code. It's nearly equivalent, except my seconds has more significant digits (maybe good, maybe not):
I'm going to argue that even splitting the discrete components of time is unnecessary, unless your logging protocol specifically requires that format. Instead, simply write the timestamp directly to file with the data points.
Also, remember to use a standard 4x2x2x4 connector pane on your SubVIs. Refer to the LabVIEW Style Guide (search, and you will find it).
Finally, I'm going to disagree with the other guys, it's not evident why you split the one loop into three loops. The only "producer/consumer" architecture has the top loop as the "producer", and all it's producing is a timestamp! This is not a typical or intended use of the producer/consumer architecture. Your VI is intended to only save a data point once every 30 minutes (presumably), so it's no big deal of both of your serial devices are in the same loop.
The single biggest problem why your VI is completely railing out a CPU core (you didn't state this, but I'm guessing the reason you posting is because you noticed a core running at 100%!) is the unmetered loop rate... like the other guys say, drop a "Wait Until Next ms Multiple" and slow the loop rate down significantly. 10msec is probably too fast for your application.... actually, a loop rate of once every 30 minutes (that's 1800000msec) might be best.
Let us know how it goes!
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Making Sound More Efficient

I got this code to play some audio clips and it works alright. The only issue is that when I call the play method it lags the rest of my game pretty badly. Is there anything in the play method you guys think could be moved to the constructor to make it more efficient?
btw I know I posted this in the sound section already but it had like 17 views there and no responses after like a week on the front page so I decided to bring it here.
package main;
import java.io.*;
import javax.sound.sampled.*;
public class Sound
     private AudioFormat format;
    private byte[] samples;
    private String name;
     public Sound(String filename)
          name=filename;
          try
            AudioInputStream stream =AudioSystem.getAudioInputStream(new File("sounds/"+filename));
            format = stream.getFormat();
            samples = getSamples(stream);
        }catch (Exception e){System.out.println(e);}
     public byte[] getSamples()
        return samples;
    private byte[] getSamples(AudioInputStream audioStream)
        int length=(int)(audioStream.getFrameLength()*format.getFrameSize());
        byte[] samples = new byte[length];
        DataInputStream is = new DataInputStream(audioStream);
        try
            is.readFully(samples);
        }catch (Exception e){System.out.println(e);}
        return samples;
    public void play()
         InputStream stream =new ByteArrayInputStream(getSamples());
        int bufferSize = format.getFrameSize()*Math.round(format.getSampleRate() / 10);
        byte[] buffer = new byte[bufferSize];
        SourceDataLine line;
        try
            DataLine.Info info=new DataLine.Info(SourceDataLine.class, format);
            line=(SourceDataLine)AudioSystem.getLine(info);
            line.open(format, bufferSize);
        }catch (Exception e){System.out.println(e);return;}
        line.start();
        try
            int numBytesRead = 0;
            while (numBytesRead != -1)
                numBytesRead =
                    stream.read(buffer, 0, buffer.length);
                if (numBytesRead != -1)
                   line.write(buffer, 0, numBytesRead);
        }catch (Exception e){System.out.println(e);}
        line.drain();
        line.close();
    public String getName()
         return name;
}

BammRocket wrote:
I got this code to play some audio clips and it works alright. The only issue is that when I call the play method it lags the rest of my game pretty badly. Is there anything in the play method you guys think could be moved to the constructor to make it more efficient?you got this code from chapter 4 of [Developing Games in Java|http://www.brackeen.com/javagamebook/] right?
are you playing the sounds in a different thread?
if not, your program will just freeze until the sound is finished.

Pointers: more efficient method(s), styles for making unconventional UI's

i currently use mages on my custom panels to give the customized look i want for my apps. But i just can shake the feeling that there are more efficient ways to do it. i just need pointers to some materials (books, articles, documentation, etc) for some technology i can use.
thanks!

i currently use mages on my custom panels to give the customized look i want for my apps. But i just can shake the feeling that there are more efficient ways to do it. i just need pointers to some materials (books, articles, documentation, etc) for some technology i can use.
thanks!

Linking from one PDF to another: Is there a more efficient way?

Some background first:
We make a large catalog (400pages) in Indesign and it's updated every year. We are a wholesale distributor and our pricing changes so we also make a price list with price ref # that corresponded with #s printed in the main catalogue. Last year we also made this catalog interactive so that a pdf of it could be browsed using links and bookmarks. This is not too difficult using Indesign and making any adjustments in the exported PDF. Here is the part that becomes tedious and is especially so this year:
We also set up links in the main catalog that go to the price list pdf - opening the page with the item's price ref # and prices... Here's my biggest issue - I have not found any way to do this except making links one at a time in Acrobat Pro (and setting various specifications like focus and action and which page (in the price list) to open) Last year this wasn't too bad because we used only one price list. It still took some time to go through and set up 400-500 links individually.
This year we've simplified our linking a little by putting only one link per page but that is still 400 links. And this year I have 6 different price lists (price tiers...) to link to the main catalogue pdf. (That's in the neighborhood of 1200-1500 double clicking the link(button) to open Button Properties, click Actions tab, click Add..."Go to page view" , set link to other pdf page, click edit, change Open in to "New Window" and set Zoom. This isn't a big deal if you only have a few Next, Previous, Home kind of buttons....but it's huge when you have hundreds of links. Surely there's a better way?
Is there anyway in Acrobat or Indesign to more efficiently create and edit hundreds of links from one pdf to another?
If anything is unclear and my question doesn't make sense please ask. I will do my best to help you answer my questions.
Thanks

George, I looked at the article talking about the fdf files and it sounds interesting. I've gathered that I could manipulate the pdf links by making an fdf file and importing that into the PDF, correct?
Now, I wondered - can I export an fdf from the current pdf and then change what is in there and import it back into the pdf. I've tried this (Forms>More Form Options>Manage Form Data>Export Data) and then opened the fdf in a text editor but I see nothing related to the documents links... I assume this is because the links are 'form' data to begin with - but is there away to export something with link data like that described in the article link you provided?
Thanks

Implicit Join or Explicit Join...which is more efficient???

Which is more efficient?
An IMPLICIT JOIN
SELECT TableA.ColumnA1,
TableB.ColumnB2
FROM TableA,
TableB
WHERE TableA.ColumnA1 = TableB.ColumnB1
Or....An EXPLICIT JOIN
SELECT TableA.ColumnA1,
TableB.ColumnB2
FROM TableA
INNER JOIN TableB
ON TableA.ColumnA1 = TableB.ColumnB1
I have to write a pretty extensive query and there will be many parts and I just want to try and make sure it is efficient as possible. Can I EXPLAIN this in SQL Navigator as well to find out???
Thanks in advance for your review and hopeful for a reply.
PSULionRP

Alex Nuijten wrote:
The Partition Outer Join is very handy, but it's an Oracle-ism - Not ANSI ...Ooh, "New thing learnt today" - check.
but then again who cares? ;)Oracle roolz! *{;-D

A more efficient way to assure that a string value contains only numbers?

Hi ,
I'm using Oracle 9.2.0.6.
I was curious to know if there was any way I could write a more efficient query to determine if a string value contains only numbers.
Here's my current query. This SQL is from a sub query in a Join clause.
select distinct cta.CUSTOMER_TRX_ID, to_number(cta.SALES_ORDER) SALES_ORDER
            from ra_customer_trx_lines_all cta
            where length(cta.SALES_ORDER) = 6
            and cta.SALES_ORDER is not null
            and substr(cta.SALES_ORDER,1,1) in('1','2','3','4','5','6','7','8','9','0')
            and substr(cta.SALES_ORDER,2,1) in('1','2','3','4','5','6','7','8','9','0')
            and substr(cta.SALES_ORDER,3,1) in('1','2','3','4','5','6','7','8','9','0')
            and substr(cta.SALES_ORDER,4,1) in('1','2','3','4','5','6','7','8','9','0')
            and substr(cta.SALES_ORDER,5,1) in('1','2','3','4','5','6','7','8','9','0')
            and substr(cta.SALES_ORDER,6,1) in('1','2','3','4','5','6','7','8','9','0')This is a string where I'm finding A-Z-a-z characters and '/' and '-' characters in all 6 positions, plus there are values that are longer than 6 characters. That's what the length(cta.SALES_ORDER) = 6 is for. Also, of course. some cells are NULL.
So the question is, is there a more efficient way to screen out only the values in this field that are 6 character numbers or is what I have the best I can do?
Thanks,

I appreciate all of your very helpfull workarounds. The cost is a little better in all cases than my original where clause.
To address the discussion that's popped up about design from this question, I can say a few things that should clear , at least, my situation up.
First of all this custom quoting , purchase order , and sales order entry system WAS written by a bunch a of 'bad' coders who didn't document their work and then left. We don't even have an ER diagram
The whole project that I'm only a small part of is literally trying to put Humpty Dumpty together again and then move it from a bad custom solution into Oracle Applications.
We're rebuilding, documenting, and doing ETL. This is one of your prototypical projects from hell.
It's a huge database project so we're taking small bites as a time. Hopefully, somewhere right before Armageddon hits, this thing will be complete.
But until then,..., well,..., you know the drill.
Thanks Again.

More-efficient keyboard

Anyone have a way to get a better onscreen keyboard going than the QWERTY one that is stock on the iPhone? I love the FITALY (fitaly.com) keyboard on my old Palm, but that company says Apple won't let them do a system keyboard. One would like to think that a Dvorak or other non-18th century keyboard could be available among the international keyboards, but I don't find one.
And yes, I've already tried the alternatives, e.g., TikiNotes, which takes me three times as long to type on than the Qwerty.
If not, this would be a great suggestion for a new feature for Apple to incorporate.

Just to let everybody know I am now 28 years old. I first learned how to type in typing class in junior high. I was using the Qwerty layout. The only nice thing I can say about the Qwerty layout is that it's available at any computer you want to use without any configuration.
Then I looked online for a better way to type and more efficient. That's when I learned about Dvorak keyboard layout. This was about four years ago. I stuck with it for about two years. I felt my right hand was doing a lot more typing than my left hand. It felt too lopsided for me. But that's just my opinion. I went on the hunt for something better than Dvorak and I found the glorious Colemak keyboard layout.
I have been typing with it ever since. My hands are a lot more comfortable and I can type faster now. It took me a month to actually get comfortable with the keyboard layout. If you actually go to this Java applet on Colemak's website.
www.colemak.com/Compare
You can just copy and paste a body of text and click on Calculate it will analyze the typing and compare the three different keyboard layouts. I just hope it becomes an ANSI standard like Dvorak has. I hope that happens in the future.
I just want everybody to know there is a third option out there and its great. If ever Colemak goes away I will be going back to Dvorak. I will never learn the Qwerty keyboard layout ever again.
Just wanted to give my two cents worth.

I need a more efficient method of transfering data from RT in a FP2010 to the host.

I am currently using LV6.1.
My host program is currently using Datasocket to read and write data to and from a Field Point 2010 system. My controls and indicators are defined as datasockets. In FP I have an RT loop talking to a communication loop using RT-FIFO's. The communication loop is using Publish to send and receive via the Datasocket indicators and controls in the host program. I am running out of bandwidth in getting data to and from the host and there is not very much data. The RT program includes 2 PID's and 2 filters. There are 10 floats going to the Host and 10 floats coming back from the Host. The desired Time Critical Loop time is 20ms. The actual loop time is about 14ms. Data is moving back and forth between Host and FP several times a second without regularity(not a problem). If I add a couple more floats each direction, the communications goes to once every several seconds(too slow).
Is there a more efficient method of transfering data back and forth between the Host and the FP system?
Will LV8 provide faster communications between the host and the FP system? I may have the option of moving up.
Thanks,
Chris

Chris,
Sounds like you might be maxing out the CPU on the Fieldpoint.
Datasocket is considered a pretty slow method of moving data between hosts and targets as it has quite a bit of overhead assosciated with it. There are several things you could do. One, instead of using a datasocket for each float you want to transfer (which I assume you are doing), try using an array of floats and use just one datasocket transfer for the whole array. This is often quite a bit faster than calling a publish VI for many different variables.
Also, as Xu mentioned, using a raw TCP connection would be the fastest way to move data. I would recommend taking a look at the TCP examples that ship with LabVIEW to see how to effectively use these.
LabVIEW 8 introduced the shared variable, which when network enabled, makes data transfer very simple and is quite a bit faster than a comparable datasocket transfer. While faster than datasocket, they are still slower than just flat out using a raw TCP connection, but they are much more flexible. Also, the shared variables can fucntion in the RT fifo capacity and clean up your diagram quite a bit (while maintaining the RT fifo functionality).
Hope this helps.
--Paul Mandeltort
Automotive and Industrial Communications Product Marketing

More efficient way to extract number from string

Hello guys,
I am using this Regexp to extract numbers from a string, and I doubt that there is a more efficient way to get this done:
SELECT regexp_replace (regexp_replace ( REGEXp_REPLACE (' !@#$%^&*()_+= '' + 00 SDFKA 324 000 8702 234 | " ' , '[[:punct:]]',''), '[[:space:]]',''), '[[:alpha:]]','') FROM dual
{code}
Is there a more efficient way to get this done ?
Regards,
Fateh

Or, with less writing, using Perl syntax \D (non-digit):
SELECT regexp_replace(' !@#$%^&*()_+= '' + 00 SDFKA 324 000 8702 234 | " ','\D')
FROM dual
REGEXP_REPLACE(
003240008702234
SQL>
{code}
SY.

Are multiple processes more efficient in Solaris 2.6 ?

I am running performance measurement tests in a Solaris 2.6 environment. The tests run one message at a time through my application and measure the response time. I found that my app will process the test message more quickly when multiple instances of the (single threaded) app are running.
This runs contrary to my intuition - since only one message is available in the message queue for processing at one time, the performance should be the same, with one or several instances running.
Does Solaris 2.6 run programs more efficiently when multiple instances exist?
I ran sar with various options, and some of the results vary, but I'm not sure which results are significant.
Thanks -

Your thinking is a little off.
What you are seeing is an attribute of a multi-processing operating system. I'm going to explain this wrong but hopefully the theme is correct. One characteristic is a single process runs on the CPU for a specific time quantum. If the process uses all of its time quantum, it gets forced off the CPU and its priority gets raised - meaning the potential that more processes could knock it off of the CPU cuz their priority is better. If it voluntarily releases the CPU, its priority gets lowered - means it may be the CPU more often if and when it needs it.
So maybe your CPU can phsyically handle 10 operations/sec. Because of scheduling topics (time quantums, interrupts, etc) and the nature of single threaded apps, that single threaded performance process of yours may only get 2 operations/sec all by itself.. By increasing the number of processes you run to say 5, you'll get your 10 operations/sec. Increasing it to 6 processes, you might get 10.5 operations/sec but you've reached your point of limited return and may start slowing thing down.
There are several good books on performance and high level queueing theory which can explain this much better then I just did.

Can we replace this SELECT query by more efficient code

can we replace this SELECT query by more efficient code ?:-
SELECT * FROM zv7_custord
     INTO TABLE G_T_ZV7_CUSTORD
     WHERE ( SENDER in S_SENDER and
             ORDNUM in S_ORDER and
             ZDATE   in S_DATE ) OR
           ( SENDER in S_SENDER AND
             STATUS = SPACE )
     ORDER BY IDOCNUM.

Hi
U can leave ORDER BY option and sort the table by yourself and try to split the query:
SELECT * FROM zv7_custord
     INTO TABLE G_T_ZV7_CUSTORD
     WHERE SENDER in S_SENDER and
                   ORDNUM in S_ORDER and
                   ZDATE   in S_DATE .
SELECT * FROM zv7_custord
     APPENDING TABLE G_T_ZV7_CUSTORD
     WHERE SENDER in S_SENDER        and
                   NOT ORDNUM in S_ORDER and
                   NOT ZDATE   in S_DATE       and
                   STATUS = SPACE
or
SELECT * FROM zv7_custord
     INTO TABLE G_T_ZV7_CUSTORD
     WHERE SENDER in S_SENDER and
                   ORDNUM in S_ORDER and
                   ZDATE   in S_DATE .
SELECT * FROM zv7_custord
     APPENDING TABLE G_T_ZV7_CUSTORD
     WHERE SENDER in S_SENDER        and
                   STATUS = SPACE.
* Sort the table key fields
SORT G_T_ZV7_CUSTORD BY <KEY1> <KEY2> .....
DELETE ADJACENT DUPLICATES FROM G_T_ZV7_CUSTORD COMPARING <KEY1> .....
Max

Make Code More Efficient

I got this code to play some audio clips and it works alright. The only issue is that when I call the play method it lags the rest of my game pretty badly. Is there anything in the play method you guys think could be moved to the constructor to make it more efficient?
package main;
import java.io.*;
import javax.sound.sampled.*;
public class Sound
     private AudioFormat format;
    private byte[] samples;
    private String name;
     public Sound(String filename)
          name=filename;
          try
            AudioInputStream stream =AudioSystem.getAudioInputStream(new File("sounds/"+filename));
            format = stream.getFormat();
            samples = getSamples(stream);
        }catch (Exception e){System.out.println(e);}
     public byte[] getSamples()
        return samples;
    private byte[] getSamples(AudioInputStream audioStream)
        int length=(int)(audioStream.getFrameLength()*format.getFrameSize());
        byte[] samples = new byte[length];
        DataInputStream is = new DataInputStream(audioStream);
        try
            is.readFully(samples);
        }catch (Exception e){System.out.println(e);}
        return samples;
    public void play()
         InputStream stream =new ByteArrayInputStream(getSamples());
        int bufferSize = format.getFrameSize()*Math.round(format.getSampleRate() / 10);
        byte[] buffer = new byte[bufferSize];
        SourceDataLine line;
        try
            DataLine.Info info=new DataLine.Info(SourceDataLine.class, format);
            line=(SourceDataLine)AudioSystem.getLine(info);
            line.open(format, bufferSize);
        }catch (Exception e){System.out.println(e);return;}
        line.start();
        try
            int numBytesRead = 0;
            while (numBytesRead != -1)
                numBytesRead =
                    stream.read(buffer, 0, buffer.length);
                if (numBytesRead != -1)
                   line.write(buffer, 0, numBytesRead);
        }catch (Exception e){System.out.println(e);}
        line.drain();
        line.close();
    public String getName()
         return name;
}

I don't know much about the guts of flex, but I assume it's
based on Java's design etc.
Storing event.target.selectedItem in an objet should not be
anymore efficient than calling event.target.selectedItem. The objet
will simply be a pointer of sorts to event.target.selectedItem. At
no point in the event.target.selectedItem call are you doing a
search or something, so storing the result will not result in any
big savings.
Now, if you were doing something like
array.findItem(something) 4 times, then yes, it would be to your
advantage to store the data.
Keep in mind that storing event.target.selectedItem in an
object will probably break bindings....that may or may not be a
problem. Objet doesn't support binding. There is a subclass of
Object that does, but I forget which.
Just a suggestion based on my knowledge of how data is stored
in an object oriented language...this may not be the case in
flex.

Would PHP or Python work more efficiently to grab from a MSSQL database in AS3?

Would PHP or Python work more efficiently to grab information from a MSSQL database in AS3? How would it work? Thanks!

that's not a flash issue.
but here's a comparison, http://benchmarksgame.alioth.debian.org/u32/benchmark.php?test=all&lang=python&lang2=php
which looks like python would be faster at data handling and slow at arithmetic operations.
you would call both server-side scripts using the urlloader class from flash.

Creating a time channel in the data portal and filling it with data - Is there a more efficient way than this?

I currently have a requirement to create a time channel in the data portal and subsequently fill it with data. I've shown below how I am currently doing it:
Time_Ch = ChnAlloc("Time channel", 271214 , 1 , , "Time" ,1 ,1) 'Allocate time channel
For intLoop = 1 to 271214
ChD(intLoop,Time_Ch(0)) = CurrDateTimeReal 'Create time value
Next
I understand that the function to create and allocate memory for the time channel is extremely quick. However the time to store data in the channel afterwards is going to be highly dependent on the length I have assigned to the Time_Ch. In my application the length of Time_Ch is variable but could easily be in the order of 271214 or higher. Under such circumstances the time taken to fill Time_Ch is quite considerable. I am wondering whether this is the most appropriate way of doing things or whether there is a more efficient way of creating a time channel and filling it.
Thanks very much for any help.
Regards
Matthew

Hi Matthew,
You are correct that there is a more efficient way to do this. I'm a little confused about your "CurrDateTimeReal" assignment-- is this a constant? Most people want a Time channel that counts up linearly in seconds or fractions of a second over the duration of the measurement. But that looks like you would assign the same time value to all the rows of the new Time channel.
If you want to create a "normal" Time channel that increases at a constant rate, you can use the ChnGenTime() function:
ReturnValue = ChnGenTime(TimeChannel, GenTimeUnit, GenTimeXBeg, GenTimeXEnd, GenTimeStep, GenTimeMode, GenTimeNo)
If you really do want a Time channel filled with all the same values, you can use the ChnLinGen() function and simply set the GenXBegin and GenXEnd parameters to be the same value:
ReturnValue = ChnLinGen(TimeChannel, GenXBegin, GenXEnd, XNo, [GenXUnitPreset])
In both cases you can use the Time channel you've already created (which as you say executes quickly) and point the output of these functions to that Time channel by using the Group/Channel syntax of the Time channel you created for the first TimeChannel parameter in either of the above functions.
Brad Turpin
DIAdem Product Support Engineer
National Instruments

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