Hi,
I apologise for the mistake. You are right. Please find the currect
snippets.
String [] arrayStr = new String[20000];
System.out.println(System.currentTimeMillis());
for(i=0;i<arrayStr.length;i++){
String a="aa";
}
System.out.println(System.currentTimeMillis());
Output:
1008319728796
1008319728799
String [] arrayStr = new String[20000];
int length = arrayStr.length;
System.out.println(System.currentTimeMillis());
for(i=0;i<length;i++){
String a="aa";
}
System.out.println(System.currentTimeMillis());
Output:
1008319767200
1008319767221
Regards,
-ShriKant
A mailing list about Java Server Pages specification and reference wrote:
> From: Sujit <[EMAIL PROTECTED]>@JAVA.SUN.COM on 12/14/2001 04:51 AM EST
>
> Please respond to A mailing list about Java Server Pages specification
and
> reference <[EMAIL PROTECTED]>
>
> To: [EMAIL PROTECTED]
> cc:
> Subject: Re: OffBeat question...Java performance.
>
> what is the difference between both the code ..
>
> I don't see any difference between the code
> that is embedded between the system.out's
>
> am I missing something ??
>
> ----- Original Message -----
> From: "ShriKant Vashishtha" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, December 14, 2001 4:34 AM
> Subject: OffBeat question...Java performance.
>
> > Hi,
> >
> > I am trying to judge the performance impact of the following Java code.
> >
> > String [] arrayStr = new String[20000];
> > System.out.println(System.currentTimeMillis());
> > for(i=0;i<arrayStr.length;i++){
> > String a="aa";
> > }
> > System.out.println(System.currentTimeMillis());
> >
> > Output:
> > 1008319728796
> > 1008319728799
> >
> > String [] arrayStr = new String[20000];
> > int length = arrayStr.length;
> > System.out.println(System.currentTimeMillis());
> > for(i=0;i<arrayStr.length;i++){
> > String a="aa";
> > }
> > System.out.println(System.currentTimeMillis());
> >
> > Output:
> > 1008319767200
> > 1008319767221
> >
> > In my view the first code stub should have been faster as in the second
> > snippet we are getting an overhead of a instance variable call over an
> > String [] object compared to the length already computed in the first
> > one. What is happening behind the scene, I am not aware. Could somebody
> > please explain.
> >
> > Thanks,
> > -ShriKant
> >
> >
>
===========================================================================
> > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
> JSP-INTEREST".
> > For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST
> DIGEST".
> > Some relevant FAQs on JSP/Servlets can be found at:
> >
> > http://archives.java.sun.com/jsp-interest.html
> > http://java.sun.com/products/jsp/faq.html
> > http://www.esperanto.org.nz/jsp/jspfaq.jsp
> > http://www.jguru.com/faq/index.jsp
> > http://www.jspinsider.com
> >
>
>
===========================================================================
> To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
> JSP-INTEREST".
> For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST
> DIGEST".
> Some relevant FAQs on JSP/Servlets can be found at:
>
> http://archives.java.sun.com/jsp-interest.html
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.jsp
> http://www.jguru.com/faq/index.jsp
> http://www.jspinsider.com
===========================================================================
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST".
For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST".
Some relevant FAQs on JSP/Servlets can be found at:
http://archives.java.sun.com/jsp-interest.html
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.jsp
http://www.jguru.com/faq/index.jsp
http://www.jspinsider.com
