A question about performance in processing a string

hi all
i have a string that contains some text - few paragraphs. there are two specific words in the string that i need to search and replace with other stuff. my question is that :
is it faster to process one line at a time to search two words(in a loop) or use the indexOf method of the String class to find one word at a time (process the text twice)? i don't really know how quick or efficient the indexOf method is. thanks in advance.

The following program replaces "James" with "Jim" and "William" with "Bill".
class Test111 {
    public static void main(String[] args) {
        String s = "James Gosling, William Gates, William Joy";
        System.out.println (s.replaceAll("\\bJames\\b", "Jim").replaceAll("\\bWilliam\\b", "Bill"));
}It must print "Jim Gosling, Bill Gates, Bill Joy".

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hi all
i have few questions about using batch process in the
java.sql package. the addBatch method can take sql
statements like inserts or updates. addBatch() is a method that has no parameters. It doesn't 'add' sql statements.
can we use a
mixture of insert and update then? can we use
prepared statement for this? it's just for
performance consideration. thanks in advance.The point of batching is that you take something that is invariant and then 'add' a variant part.
Thus a single insert has an invariant part (the table and specific columns) and a variant part (the data for each row by column.)
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A simple question about performance!

Hi! I have a simple question about performance. Suppouse that you have a servlet or a class with DB access, and you need to use a value several times in that page. What is best, to assign the value from say, a resultset or a request.getParameter() to a variable or to call the resultset or the request every time you need to retrieve that value? Which option uses less memory, which is faster, etc.?
Hoping the best fou u
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Hi Chris -- follow up to my question about using TSQ to store strings of different sizes

Thanks for your response.
I did read about those method you mentioned. I have some troubles with each method:
1/ Using TSQ as byte stream.
This is what I chose to use. I basically write to the queue the way you described with an exception about the number of byte to write. I did as followed:
CmtWriteTSQData (tsqHandle, buffer, strlen (buffer),TSQ_INFINITE_TIMEOUT, NULL);
with buffer as the buffer containing my string. Note that strlen(buffer) is not same each time. Also a thread is doing the writing to the queue and another thread is doing the reading. This leads to my next question: How do you read these strings out?
Right now I am reading one
byte at a time with:
while (1)
CmtReadTSQData (tsqHandle, tempbuf, 1, 10, 0);
in a loop, with tempbuf to contain this single char, and then store it in another buffer until I read out a CR of LF which signals the end of a string.
Will I have any problem?
Could you please provide an alternative?
2/ Using TSQ to contain pointers to strings.
I haven't tried this method since I think it requires allocation of rather large static array of buffer and also requires keeping track of these pointer in a link list.
Would you elaborate how you would use TSQ this way in my case.
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Why is it different if the writ
ing thread is the main thread? Do I miss something like priority,... or anything like that?
Thank you so much.

You really should consider using event driven reading. There is examples of this in the Multithreading examples in cvi\samples\utility\Threading. Then you will get an event in the reader thread whenever a certain number of items are available to read. If you use the byte stream method, you should send the message length with each method so you know how to package the messages back on the reader side.
For the pointer method, you would malloc the buffer on the writer side, send the pointer to the reader, then the reader would free the memory when it is done with the data.
I don't understand why what you are describing in 3 occurs. If you aren't setting priority to something other than default, then each thread should get time. If you want to free up time i
n a thread that is taking to much, just put a small Delay in that thread.
If you want more help on this, you can look at the examples I mentioned above, read the Multithreading Overview available in PDF form in the cvi\bin directory or contact NI support at http://www.ni.com/ask.
Best Regards,
Chris Matthews
Measurement Studio Support Manager

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Hi,
I have some questions about OpenSparc T1 Dcache load processing.
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Store buffer is checked for Read after Write (RAW) condition on loads. If there is full RAW - i.e. full data exists in the store buffer - then the data is bypassed and no D cache access happens.
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Question about how XI process files in FTP

Hi experts,
I have a file-FTP to JDBC scenario.
XI scans a folder every minute to see if any file has appear.
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Kind regards,
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Hi,
from SAP Help:
If you select files from an FTP server and not from the file system, you need to make the following additional specifications:
○       ftp.host=<ftp-server>
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Regards
Patrick

A question about the Installation process in general

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A question about Performance Settings

         Dear all.
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Peanuts
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Interview Question about performance

Could somebody answer this.
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A question about CPS (CPS processing) and CAPolicy.inf file.

Hello All
Can someone please help me with the following question.
Background, I am building a 3-tier PKI infrastructure. offline Root, offline Policy (intermediate), online issuing.
Now my first question is about CPS (certificate practice statement) for this example lets just call this the InternalIssuancePolicy as below.
Basically I was thinking it is best not to set a given certificate (aka issuance) policy at the Root, the reason being I may wish to have different issuance policies at a latter date.
For example right now I just want an issuance policy (CPS) for internal certificates only, therefore I am thinking set this at the Policy CA level, as below [InternalIssuancePolicy] (example OID) and then issuing CA certs from this Policy CA to the
internal issuing CAs. If at a latter date I want a different policy (CPS) for issuance of external certificates I can build a new Policy CA under the existing Root with a different policy extension.
Is the above logic sound?
Questions:
I am assuming from recent study that the CA cert issued to the Issuing CA will contain a single issuance policy "only" i.e. the one that was specified in the Policy CA 1.3.6.1.4.11111111.1.1.1. If so I believe you cannot build a new
issuing CA and submit the CSR to the Policy CA asking for a CA cert with any other certificate policy extension other than 1.3.6.1.4.11111111.1.1.1
Is that correct?
Also
I saw a blog post which stated if are going to use certificate/issuance policies (other than all issuance policies) you should mark the extension as critical=true otherwise the policy just becomes glorified comment. I take the point but that leads me to
two more questions
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** Root **
[Version]
Signature= "$Windows NT$"
[Certsrv_Server]
RenewalKeyLength=4096
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RenewalValidityPeriod=20
CRLPeriod=Years
CRLPeriodUnits=1
LoadDefaultTemplates=False
AlternateSignatureAlgorithm=0
[CRLDistributionPoint]
[AuthorityInformationAccess]
basicconstraintsextension]
pathlength = 2
critical=true
PolicyStatementExtension]
Policies = AllIssuancePolicy
Critical = FALSE
[AllIssuancePolicy]
OID = 2.5.29.32.0
** Policy CA **
[Version]
Signature= "$Windows NT$"
[Certsrv_Server]
RenewalKeyLength=2048
RenewalValidityPeriodUnits=Years
RenewalValidityPeriod=10
CRLPeriod=Years
CRLPeriodUnits=1
[PolicyStatementExtension]
Policies = InternalIssuancePolicy
Critical = False
[InternalIssuancePolicy]
OID = 1.3.6.1.4.11111111.1.1.1
Notice = "Internal Certificate Policy"
URL="http://pki.lab.local/Certenroll/CPS.txt"
[AuthorityInformationAccess]
URL=http://pki.lab.local/Certenroll/PolicyCA01.crt
[CRLDistributionPoint]
URL=http://pki.lab.local/Certenroll/PolicyCA01.crl
[basicconstraintsextension]
pathlength = 1
critical=true
** Issuing CA **
[Version]
Signature= "$Windows NT$"
[Certsrv_Server]
RenewalKeyLength=2048
RenewalValidityPeriodUnits=Years
RenewalValidityPeriod=5
CRLPeriod=Weeks
CRLPeriodUnits=1
CRLDeltaPeriod=Days
CRLDeltaPeriodUnits=1
LoadDefaultTemplates=False
AlternateSignatureAlgorithm=0
[AuthorityInformationAccess]
URL=http://pki.lab.local/Certenroll/IssuingCA01.crt
[CRLDistributionPoint]
URL=http://pki.lab.local/Certenroll/IssuingCA01.crl
[basicconstraintsextension]
pathlength = 0
critical=true
Thanks All
AAnotherUser__

> Is the above logic sound?
not that much. In this case 3-tier PKI could be reduced to 2-tier. Make default Offline Root CA and below it issuing CAs with desired policy OIDs. You will combine issuing CA with policy CA functionality. Additional tier will cost you a license, administration
overhead and increased certificate chain processing delays. There is nothing wrong if you combine policy CAs with issuing.
> I saw a blog post which stated if are going to use certificate/issuance policies (other than all issuance policies) you should mark the extension as critical=true
where did you get this? Certificate policies should not be marked critical. Certificate chaining engine will take care of it, when application reqests CCE to validate desired policy.
> does setting the extension to critical also force the client to try and access the URL listed
no. Certificate chaining engine do not inspect policy qualifier URLs.
> Any comments suggestions on my proposed three CAPolicy.inf files below for the 3-tier PKI (again offline Root and Policy)
[CRLDistributionPoint]
[AuthorityInformationAccess]
[PolicyStatementExtension]
Policies = AllIssuancePolicy
Critical = FALSE
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these sections are not required in root CA.
[AuthorityInformationAccess]
URL=http://pki.lab.local/Certenroll/PolicyCA01.crt
[CRLDistributionPoint]
URL=http://pki.lab.local/Certenroll/PolicyCA01.crl
[basicconstraintsextension]
pathlength = 1
critical=true
These sections are not required at policy CA. Afaik, CDP and AIA extensions are not supported in non-root CA configuration files. The same is with issuing CA. And your issuing CA is missing PolicyStatementExtension section.
Vadims Podāns, aka PowerShell CryptoGuy
My weblog: en-us.sysadmins.lv
PowerShell PKI Module: pspki.codeplex.com
PowerShell Cmdlet Help Editor pscmdlethelpeditor.codeplex.com
Check out new: SSL Certificate Verifier
Check out new:
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HCM Processes & Forms - Some questions about the PD Processes

Hi Experts,
At my Organisation we use HCM Processes and Forms and Organisation Management and MSS to manage Position Based Security (PBS).
The MSS Managers have requested a form be developed which they can use to extend an existing Position to Employee temporary assignment (IT1001 S-P with A081 relationship) which is due to expire within the next 30 days. We recently upgraded to ECC EHP6 and I thought I would now have a go at developing this Form.
While researching in SCN and SAP Press books on the ‘HCM Processes and Forms’ topic, I have discovered a lot of information that has assisted me so far in progressing this solution.
There are a few givens that I have confirmed so far, which are as follows;
Since we are using Positions (Organisation Management), the only option available here is to use the PD Process, which implies using the SAP_PD Back_End Service. Therefore this become the baseline to build upon.
While researching in SCN and SAP Press books on this subject I could not find relevant information about what is possible using the SAP_PD Service to achieve my solution design for the above requirements and thus my post to the HCM P&F Community for assistance.
My questions are as follows;
In the solution design, I was considering to use the “Process without Start Object” or “Mass Start” to skip Step 1 - “Selection Object” and use a Generic Service to get all the positions for the Manager (along the lines of the SAP Standard Generic Service - find Positions in Manager’s area of Responsibility) and only retain the Positions where the End Date for the IT1001 A081 relationship in between the Effective Date and Effective Date plus 30 days. This should provide me with all the positions under the Manager that have the A081 relationship with the assigned employee that are about to expire within the next 30 days.
I want the result presented on the Form in a Table format so that the Manager has to enter the Extension Start Date and End Date for the new assignment period.
Is this possible using Standard Design Time functionality?
2.      Or Instead of Question 1, could I use OADP to achieve the same result using a custom search class to return a list of multiple objects (Positions)which is used to populate the form?
3.       I get the impression that the ‘Mass Start’ process is mainly for multiple employees. Can it also be used for multiple PD objects?
4.       I get the impression that if I used the ‘Mass Start’ option I could only use this if I was CREATING a new object or assignment? (I take it that you cannot use the Mass Start option to CHANGE multiple existing objects. Only because I have not seen any SAP Standard examples of this yet!)   Please confirm if this is possible?
5.       Has anyone used the “Query for Mass Start” option on a Process? How does that work? (Could I write a ‘SAP Query’ to get the positions I am interested in under the Manager?) Is there a sample SAP Standard process that uses a query?
Your assistance would be greatly appreciated.
Thanks in Advance.
Regards,
Steve

no limit
no limit
limitations of what?
you can use forms on mac, pc, and other systems

KDE4 + wallpaper slideshow: few questions about performance / tuning.

Hello,
I am using KDE 4.4 from pacman and set my desktop activity to slideshow. I would like to customize few things and thus - I have few questions:
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I would be glad for any sugestions / interest in helping me;)
Best regards,
Mike.

Hello
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2/ There's a plasma applet for this :
http://kde-look.org/content/show.php/Ne … tent=94251
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Last edited by xvello (2010-05-16 16:20:24)

A simple question about the Integration process and the PI system

Hi all
Out PI system gets more and more slowly .
in the Monitor I can se that there are many ufinished IP about 100.
in the Outbound colon there is a Watch icon with the message
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my question is can those unfineshed IP be guilty in slowing down the system by taking resources, they have been there for quit a long time .
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I have checked sm12 , no locks
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I want to discuss the issues around LOB objects.
If I have an enttity class with n-count fields and then a lob as the n+1th field, does this affect performance in any way ? E.g. if performance is random access for an object without a lob, does the performance get linear or something when the lob is introduced?
Another one:
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What about fragmentation ? How can a database or whoever compensate for fragmentation, in the case the lob is the n+1th field ? Or just in general: How the fragmentation issues are handled?
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Question about performance (entities & data object)

Hello:
I know that this can be, maybe, a silly question, but I've got the doubt
I get a local reference to a entity ( myEntityLocal ) and I'm going to get many values from it.
For example
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myEntityLocal getName();
myEntityLocal.getAddr();
etc etc
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myEntityData.getAddr();
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For remote interface(like accessing EJB from Servlets resides in diffferent Apps Server) use the DTO(data Transfer Object) patterns.
Regards
Sushil

A question about performance in processing a string

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