Need for efficiency tips

I guess efficiency refers to about run-time,
compile-time, and memory usage.
I am wondering whether there are some easy tricks for
efficiency:
I am really new, forgive me if i am wrong.
-using static variables, methods //contradicts the
idea of objectsNo contradiction. Saves memory - make all variables that you don't need for each object of the class static
-final classes, final methodsNothing to do with efficiency. That�'s about prohibiting inheritence.
-declare a local rather than a global variable, if the
variable is only needed locallyPerhaps, though I doubt it wioll be of much use.
-something about importsNo. Java loads classes only as needed, not while processing the import statement.
>
Thanx in advance

Similar Messages

@Ceroberts75-Need for Speed Questions !

OK, This is in specific to Ceroberts75 and maybe also others... After People have reported some improvements in smoother and faster working of their N900 after the PR 1.3 update. The Need for speed Tips that Ceroberts75 has posted in his topic " Top 12 Maemo Issues and Fixes that Ceroberts" After the PR 1.3 update is it still required ?
Following those tips for Need for speed, is it gonna make the device even more faster and smoother even after the PR 1.3 Update. is it still required after PR 1.3 update ?

ceroberts75 wrote:
dont worry about it. it is not going to hurt your device....
but if you still feel like there is a little monster lurking around the corner that is going to get you, then when you uninstall the swappolube, it will automatically go back to stock settings.
this is the same for the transition control.
as for the speed and which one you should use....that kernel that you installed, enhanced kernel.... all the different speeds are fine. i have 2 units locked at 1.15ghz since it came out and prior to that, at 900mhz. i have yet to see anything bad happen, ie-phone catching on fire or burning my face, or discoloring my elppa casing...oops...was that my outside typing fingers? anyway...i would not have put it up there if it wasnt safe to do so.
have fun with it...you will not hurt your device doing so.
Hey Ceroberts75,
Sorry if I am asking you this again, But I am still not really satisfied. I am OK with Swappolube, But I want to delete this events.d.folder that it created when I accidentally also clicked on the store Tab (pls check the screenshot). How do I delete events.d.folder. I checked my entire phone I could not find it anywhere where has it gone and is hiding.
I am ok with Swappolube but I don’t want the events.d.folder to store anything.
is the events.d.folder associated with Swappolube? So if I uninstall swappolube will it also go away with swappolube !!
Attachments:
Swappolube.jpg ‏58 KB

I have a Macbook Pro 15" that is three and a half years old. Although it has slowed a bit, it still runs well and runs every program I need. Any tips for how to keep this old computer running well and in good health?

I have a Macbook Pro 15" that is three and a half years old. Although it has slowed a bit, it still runs well and runs every program I need. Any tips for how to keep this old computer running well and in good health?
I have a 250 gig drive and try to keep at least 100 gigs unused at all times, 4 GB 667 MHz DDR2 SDRAM memory, back up with Time Machine and CrashPlan, and have OS X 10.7.3.
This was my first Mac since an old Apple II GS. After that I used PC's and got really good at reformatting, replacing drives, reinstalling, defragging, resolving software conflicts, etc. Since switching back to Macs (five in my extended family now), I haven't had to do any of those things. So, although, the cost is three times as much, the aggrevation has been ten times less.
I'm retired and living on a fixed income and would therefore like to keep this computer running as opposed to constatntly upgrading.
That said, any tips?
Thanks
It does have a crack on the left of the screen case about 3/4'' up from the bottom. I've posted that as another question.

Kappy's Personal Suggestions for OS X Maintenance
For disk repairs use Disk Utility. For situations DU cannot handle the best third-party utilities are: Disk Warrior; DW only fixes problems with the disk directory, but most disk problems are caused by directory corruption; Disk Warrior 4.x is now Intel Mac compatible. Drive Genius provides additional tools not found in Disk Warrior. Versions 1.5.1 and later are Intel Mac compatible.
OS X performs certain maintenance functions that are scheduled to occur on a daily, weekly, or monthly period. The maintenance scripts run in the early AM only if the computer is turned on 24/7 (no sleep.) If this isn't the case, then an excellent solution is to download and install a shareware utility such as Macaroni, JAW PseudoAnacron, or Anacron that will automate the maintenance activity regardless of whether the computer is turned off or asleep. Dependence upon third-party utilities to run the periodic maintenance scripts was significantly reduced since Tiger. These utilities have limited or no functionality with Snow Leopard or Lion and should not be installed.
OS X automatically defragments files less than 20 MBs in size, so unless you have a disk full of very large files there's little need for defragmenting the hard drive. As for virus protection there are few if any such animals affecting OS X. You can protect the computer easily using the freeware Open Source virus protection software ClamXAV. Personally I would avoid most commercial anti-virus software because of their potential for causing problems. For more about malware see Macintosh Virus Guide.
I would also recommend downloading a utility such as TinkerTool System, OnyX 2.4.3, or Cocktail 5.1.1 that you can use for periodic maintenance such as removing old log files and archives, clearing caches, etc.
For emergency repairs install the freeware utility Applejack. If you cannot start up in OS X, you may be able to start in single-user mode from which you can run Applejack to do a whole set of repair and maintenance routines from the command line. Note that AppleJack 1.5 is required for Leopard. AppleJack 1.6 is compatible with Snow Leopard. There is no confirmation that this version also works with Lion.
When you install any new system software or updates be sure to repair the hard drive and permissions beforehand. I also recommend booting into safe mode before doing system software updates.
Get an external Firewire drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is not significant):
Carbon Copy Cloner
Data Backup
Deja Vu
SuperDuper!
SyncTwoFolders
Synk Pro
Synk Standard
Tri-Backup
Visit The XLab FAQs and read the FAQs on maintenance, optimization, virus protection, and backup and restore.
Additional suggestions will be found in Mac Maintenance Quick Assist.
Referenced software can be found at CNet Downloads or MacUpdate.
Be sure you have an adequate amount of RAM installed for the number of applications you run concurrently. Be sure you leave a minimum of 10% of the hard drive's capacity as free space.
Adding more RAM, if feasible, and a new, faster hard drive may also help pep it up a little.

Tip needed for an excel-type grid for TableView

Hi,
I am looking for a tip on how to implement a excel like grid where row numbers are always displayed on the left (part of the margin, not as a column).
Thx
T

I believe the best way to implement this would require this feature (Tableview with rows headers TableView row headers).
It is linked to a bug with private permission (http://javafx-jira.kenai.com/browse/RT-8829) so you can't vote on it, and is not scheduled for any release currently.
So, lacking that feature, you may have to do something clever, such as create two columns next to each other in a vbox, one containing column headers and data and another containing just the row numbers, then keep all of it in synch so that scrolling the main table will also scroll the row header table and ensure the height of the rows in the two table are kept in synch. There are probably other methods to achieve this, but this was the idea off the top of my head.

What kind of mac would I need for Nexflix, basic search and email? Also, sounds silly, but can I connect an HDMI from Mac to tv?

What kind of mac would I need for Nexflix, basic search and email? Also, sounds silly, but can I connect an HDMI from Mac to tv?

Just an FYI. The Macs named PowerMac date from early 2006 and before. Use this tip to discover where to post once you get your Mac:
Site map of Communities and Categories
The cheapest Mac available new is a Mac Mini. It is no bigger than many an external hard drive. But the screen and keyboard and mouse must be purchased separately. They support USB and Bluetooth keyboards and mice, and pretty much any DVI, HDMI, or displayport display. Although the iMac is certainly an attractive option if all you want to deal with is deciding on a printer. I still recommend getting an Apple USB keyboard for the occasional times you may need to troubleshoot startup issues. Normally not a problem, but as it gets older some issues can be fixed at startup or diagnosed at startup.

Paragraph Format for Notes, Tips & Warnings With Graphics

I have been reading Publishing Fundamentals and it says you can create a paragraph format that uses the Frame Above Pgf & Below Pgf and Graphics Frames to create a Paragraph Style for Notes, Tips, Warnings, etc. that includes lines above and below and a graphic to the side.
I am attaching a FrameMaker file that shows what I have been able to accomplish and also shows what I really want. To look at this file, save it and rename, dropping ".text" from the file name.
I am using FrameMaker Version 8.0p277 (the Technical Communications Suite version). My colleagues all have FrameMaker 8 (not the Tech Comm Suite version) and I need to share my template with them.
I appreciate any and all suggestions,
Cheryl

Cheryl Bowsher wrote:
I have been reading Publishing Fundamentals and it says you can create a paragraph format that uses the Frame Above Pgf & Below Pgf and Graphics Frames to create a Paragraph Style for Notes, Tips, Warnings, etc. that includes lines above and below and a graphic to the side.
I am attaching a FrameMaker file that shows what I have been able to accomplish and also shows what I really want. To look at this file, save it and rename, dropping ".text" from the file name.
I am using FrameMaker Version 8.0p277 (the Technical Communications Suite version). My colleagues all have FrameMaker 8 (not the Tech Comm Suite version) and I need to share my template with them.
I appreciate any and all suggestions,
Cheryl
Hi, Cheryl:
Search Google for "siliconprairie autotext" (without quotes) for an inexpensive tool, and "reficons" (without quotes) for a free tool. They both are useful for this kind of thing.
HTH
Regards,
Peter
Peter Gold
KnowHow ProServices

What do I need for a clean installation

Recently I bought the T61p Thinkpad along with the preinstalled Vista Ultimate. I'm most satisfied about the system and its performance. However due to heavy(read crappy) preinstalled software the performance is wors than my other almost 8 years old laptop. Therefor I want to do a clean installation of the system software. My question is, what do I need when it comes to my OS when I decide to choose one partition and do a full format of my hd. I have read several online tutorials on this issue but there's no info on what you need for this other than "a Vista CD" Does this mean I have to buy a new 'retail Vista Windows' or an 'OEM Vista Windows'(from Lenovo or any other shop?) or can I use the discs that came with the system listed beneath? And do I need to make a copy of all preinstalled progams and drivers or are they on the 8 discs?
What do I have already: Along with the Thinkpad there came 8 discs:
- 'Rescue and Recovery CD'
- 'Supplemental Product Recovery CD for type 6480,.....,.....etc.'
- '6x 'Product Recovery CD for ThinkPad T61,R61 Type 6480,.....,......etc'
Furthermore I've read something on this forum about the Intel turbomem and its NV cache??? Is this something to take in consideration when doing a clean install?
Thanks in advance!
Che

Hi, I post this in the other message and it may help you. Here is the steps for clean install for T61p (without Turbo memory):
1. Install you own Vista (you don't need to backup the original, Lenovo Thinkpad has the backup)
2. Install your firewall if you have one;
3. Plug in internet cable and download "automatic system update from Lenovo- system update
3.13" (here is the link: http://www-307.ibm.com/pc/support/site.wss/TVSU-UPDATE.html#hp) and install it. (The system update software can download all the drivers for you)
4. Before run the System update, adjust internet setting (internet option-->connection-->Lan setup-->disable automatic search (the first one)), otherwise the software'll be interrupted in the middle.
5. Run system update and download the drivers and softwares you need.
6. Download and install Video card driver: Either FM570 from Lenovo (for 3D work) or 8600GT(for gaming). (I just installed FM570 from Lenovo website cause I am using it for CAD as well)
Then........................
Tips for speed up the Vista (dramaticly~~!):
Control Panel-->System-->Advance system setup-->Advance-->Performence
-->>Advance-->virtual memory (change)-->Choose no page files
The reason for this is that HD almost does the most hard work in the latop and virtual memory will increase the most work load for it. Since we have 4GB ram, we don't need virtual memory and relase HD's load.

How do I find out if my computer has what it needs for a wireless router ?

I have an hp a6620f ,64 bit pentuimn dual core cpu ,4 gb , vista home edition, dsl modem internet connection. Do I have what I need to hook up a wireless router.

Belkin Play Wireless N USB Adapter
Model: F7D4101 | SKU: 9764199
Connect your laptop or desktop computer to a wireless network with this USB adapter that features 802.11a/b/g/n wireless connectivity and data transfer rates up to 300 Mbps for efficiency.
2.8 Read reviews (5)
Sale: $69.99
Here is an example.
I am a Bestbuy employee who volunteers on these boards on my own time. I am not paid for posting here, and you should understand that my opinions are exactly that - opinions. I do not represent Bestbuy in any way.
: Open Mailbox

Looking for t-tip silicone cover for the charger macbook?

I'm looking for t-tip silicone cover for the charger macbook pro
where can I find it?
thanks for helping me out

There are literally thousands of helpful tutorials online that will teach you all that you need to know in order to do what you are attempting.
If you want to know how to make a color background...just google 'how to make a color background in FCP. Or simply type it into the Search in this forum. Unlimited information is available for each question you have.
Guess I should have asked for a personal assistant and not wasted all that time in the manual.

I spilled a small amount of wine on my macbook pro, I know, killing myself over this! I dried it fully but 24 hours later the keys are very sticky and it won't find the Bluetooth module - everything else seems to be working fine. Thanks for any tips!

I spilled a small amount of wine on my macbook pro keyboard, I know, killing myself over this! I dried it fully but 24 hours later the keys are very sticky and it won't find the Bluetooth module so I can't use my magic mouse - everything else seems to be working fine. Thanks for any tips!

Your keyboard will never be right again; it needs to be replaced. There's no effective way to clean sticky stuff out of it. Your Bluetooth module may have been shorted out and destroyed, and it probably isn't dry yet after only 24 hours.
Take your machine in for repair, and expect a hefty bill in the hundreds of dollars.

Help needed for writing query

help needed for writing query
i have the following tables(with data) as mentioned below
FK*-foregin key (SUBJECTS)
FK**-foregin key (COMBINATION)
1)SUBJECTS(table name)
SUB_ID(NUMBER) SUB_CODE(VARCHAR2) SUB_NAME (VARCHAR2)
2           02           Computer Science
3           03           Physics
4           04           Chemistry
5           05           Mathematics
7           07           Commerce
8           08           Computer Applications
9           09           Biology
2)COMBINATION
COMB_ID(NUMBER) COMB_NAME(VARCHAR2) SUB_ID1(NUMBER(FK*)) SUB_ID2(NUMBER(FK*)) SUB_ID3(NUMBER(FK*)) SUBJ_ID4(NUMBER(FK*))
383           S1      9           4           2           3
384           S2      4           2           5           3
---------I actually designed the ABOVE table also like this
3) a)COMBINATION
COMB_ID(NUMBER) COMB_NAME(VARCHAR2)
383           S1
384           S2
b)COMBINATION_DET
COMBDET_ID(NUMBER) COMB_ID(FK**) SUB_ID(FK*)
1               383          9
2               383          4
3               383          2
4               383          3
5               384          4
6               384          2
7               384          5
8               384          3
Business rule: a combination consists of a maximum of 4 subjects (must contain)
and the user is less relevant to a COMB_NAME(name of combinations) but user need
the subjects contained in combinations
i need the following output
COMB_ID COMB_NAME SUBJECT1 SUBJECT2      SUBJECT3      SUBJECT4
383     S1     Biology Chemistry      Computer Science Physics
384     S2     Chemistry Computer Science Mathematics Physics
or even this is enough(what i actually needed)
COMB_ID     subjects
383           Biology,Chemistry,Computer Science,Physics
384           Chemistry,Computer Science,Mathematics,Physics
you can use any of the COMBINATION table(either (2) or (3))
and i want to know
1)which design is good in this case
(i think SUB_ID1,SUB_ID2,SUB_ID3,SUB_ID4 is not a
good method to link with same table but if 4 subjects only(and must) comes
detail table is not neccessary )
now i am achieving the result by program-coding in C# after getting the rows from oracle
i am using oracle 9i (also ODP.NET)
i want to know how can i get the result in the stored procedure itsef.
2)how it could be designed in any other way.
any help/suggestion is welcome
thanks for your time --Pradeesh

Well I forgot the table-alias, here now with:
SELECT C.COMB_ID
, C.COMB_NAME
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID1) AS SUBJECT_NAME1
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID2) AS SUBJECT_NAME2
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID3) AS SUBJECT_NAME3
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID4) AS SUBJECT_NAME4
FROM COMBINATION C;
As you need exactly 4 subjects, the columns-solution is just fine I would say.

XMLAGG structure, performance help needed for odd nesting in schema

Hello,
I have to produce XML to look like:
<?xml version='1.0'?>
<enterprise>
    <membership>
      <sourcedid>
        <id>PHYS_101_001_FA2007</id>
      </sourcedid>
    
    <member>
      <sourcedid>
        <id>D2LU0001</id>
      </sourcedid>
      <role roletype="Sample Role">
        <status>1</status>
      </role>
    </member>
    <member>
      <sourcedid>
        <id>D2LU0002</id>
      </sourcedid>
      <role roletype="Sample Role">
        <status>1</status>
      </role>
    </member>
</membership>
</enterprise>This would be straightforward if the schema allowed for a "<members>" tag under which to nest the <member> tags. But, it does not allow for that tag or any other than those listed above.
I have a query which does produce that output (except for the roletype attribute), but its performance is horrible; it takes about 40 minutes to return data:
SELECT
     XMLROOT(
         XMLELEMENT("enterprise",
           XMLAGG(
             XMLELEMENT("membership",
               XMLFOREST( XMLELEMENT("id",cx.mapped_course_id) as "sourcedid"
               (SELECT XMLAGG(
                 XMLELEMENT("member",
                   XMLFOREST(XMLELEMENT("id",spriden_id) AS "sourcedid",
                             XMLELEMENT("status",'1') AS "role"
                  FROM enrollments_fall_sfrstca efs
                     , spriden sp
                     , gzv_tuid t
                 WHERE sp.spriden_change_ind IS NULL
                   AND sp.spriden_pidm       = t.pidm
                   AND t.tuid                = efs.user_name
                   AND efs.mapped_course_id = cx.mapped_course_id
                   AND efs.term              = cx.semester
            , VERSION '1.0', STANDALONE NO VALUE)
FROM courses_xt cx
WHERE cx.semester = :term_code
;Similar queries are producing courses and users XML fine with no performance issues, but these are driven off either the courses view or the enrollments view, but not both.
Is there some other way I can produce the nesting I need for the vendor's schema?
The source views are basically as follows (showing relevant columns only):
courses_xt:
MAPPED_COURSE_ID       SEMEST
AVFT209-13307-201210   201210
AVFT210-13308-201210   201210enrollments_fall_sfrstca:
MAPPED_COURSE_ID       USER_NAME
AVFT209-13307-201210    FULLERC8
AVFT209-13307-201210    SHUPEK
AVFT209-13307-201210    NOMAN
AVFT210-13308-201210    SHUPEK
AVFT210-13308-201210    PELLONMWhen I have the query without the XML (with the subquery as a column of the outer query), this returns the correct data quickly (a couple of minutes).
I have tried various permutations of XMLFOREST, XMLELEMENT, XMLAGG but either I get syntax errors, or the data is wrong (e.g. repeated '<membership>' for each '<member>', or I have to create an invalid tag '<members>' to be filtered later).
Please advise!
Thanks,
Anita Lees

Hi Anita,
Have you tried with a GROUP BY and no subquery?
Here's an example using SCOTT schema.
I've used the same tag names and structure so that you can see the analogy :
SELECT XMLElement("enterprise",
         XMLAgg(
           XMLElement("membership",
             XMLElement("sourceid", xmlelement("id", d.deptno))
           , XMLAgg(
               XMLElement("member",
                 XMLElement("sourceid",
                   XMLElement("id", e.empno)
               , XMLElement("role",
                   XMLAttributes(e.job as "roletype")
                 , XMLElement("status", '1')
FROM scott.dept d
     LEFT OUTER JOIN scott.emp e ON e.deptno = d.deptno
WHERE d.deptno IN (10,20)
GROUP BY d.deptno
;which gives :
<enterprise>
<membership>
    <sourceid>
      <id>10</id>
    </sourceid>
    <member>
      <sourceid>
        <id>7782</id>
      </sourceid>
      <role roletype="MANAGER">
        <status>1</status>
      </role>
    </member>
    <member>
      <sourceid>
        <id>7934</id>
      </sourceid>
      <role roletype="CLERK">
        <status>1</status>
      </role>
    </member>
    <member>
      <sourceid>
        <id>7839</id>
      </sourceid>
      <role roletype="PRESIDENT">
        <status>1</status>
      </role>
    </member>
</membership>
<membership>
    <sourceid>
      <id>20</id>
    </sourceid>
    <member>
      <sourceid>
        <id>7369</id>
      </sourceid>
      <role roletype="CLERK">
        <status>1</status>
      </role>
    </member>
    <member>
      <sourceid>
        <id>7902</id>
      </sourceid>
      <role roletype="ANALYST">
        <status>1</status>
      </role>
    </member>
    <member>
      <sourceid>
        <id>7566</id>
      </sourceid>
      <role roletype="MANAGER">
        <status>1</status>
      </role>
    </member>
</membership>
</enterprise>

MSI ti 4200 128 MB and Problems with "Need for Speed: HighStakes"

Does any one know of a fix for "Need for Speed: HighStakes" with the new 45.32 drivers. When trying to start this game it won't even load, the screen goes dark for a second and then falls back to the desktop. Did the same thing with 43.45, but if I install the drivers that came with the Video card ( I think they were 31.XX) then the game works fine. Haven't come across any other games that won't run except this one, some examples that work fine are UT 2003, C&C: Generals, Warcraft 3, Hot Pursuit 2.
System:
XP pro OS (sevice pack 1) DirectX 9
Athlon 1800
512 MB RAM
MSI nforce 2 Main board
MSI GeForce 4 4200 ti 128 MB 8X AGP
Thanks for any info.

well I "bugged" the game makers (EA) and the response is that the game doesn't suport Windows XP. Strange that the older nVidia 31.xx drivers work fine with the game. Also played it on my last machine which had XP and a ATI radeon video card. OH well who ever said Direct X was supposed to be backward compatible.
Too bad the older drivers don't work so well with the newer games.

Hi! I can't upgrade my iTunes 10.3.1.55 on my Windows XP 2002 SP3 to the latest version of iTunes. Got the message: "A problem has occured with the Windows Installer-package. A program needed for this installation could not be run." What to do?

Hi! I can't upgrade my iTunes 10.3.1.55 on my Windows XP 2002 SP3 to the latest version of iTunes. Got the message: "A problem has occured with the Windows Installer-package. A program needed for this installation could not be run." What to do?

Perhaps let's first try updating your Apple Software Update.
Launch Apple Software Update ("Start > All Programs > Apple Software Update"). Does it launch and offer you a newer version of Apple Software Update? If so, choose to install just that update to Apple Software Update. (Deselect any other software offered at the same time.)
If the ASU update goes through okay, try another iTunes install. Does it go through without the errors this time?

Hi have just purchased iphone 4s . my itunes on my mac is currently 10.4 . 10.5 is needed for the new iphone but when i download it and click on install the itunes about still says 10.4 . have tried to update through itunes but it says there is no softwar

hi have just purchased iphone 4s . my itunes on my mac is currently 10.4 . 10.5 is needed for the new iphone but when i download it and click on install the itunes about still says 10.4 . have tried to update through itunes but it says there is no software available for me . please help . mr frustrated

If your computer is running an OS X prior to Snow Leopard 10.6,
the answer (if it is an Intel-based Mac; not old PowerPC model)
would be to buy the retail Snow Leopard 10.6 DVD from Apple
for about $20, and install it. Then update that to 10.6.8 by using
the installed Snow Leopard online to get Combo Update v1.1 for
Snow Leopard 10.6.8. After that is installed & updated, run the
system's Software Update again, to see what else is available to
that system.
Later systems can then be looked into at Mac App Store, once
the computer is running Snow Leopard 10.6.8.
And if your computer is a Power PC (G4/G5, etc) and has no
Core2Duo kind of CPU -- See "About this Mac" in apple menu
to disclose the general info about your Mac. Also you can see
even more by clicking on "More Info" when looking in there...
If it isn't an Intel-based Mac, it can't run a system past 10.5.8.
Hopefully this helps.
Good luck & happy computing!

Need for efficiency tips

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