Hi Anthony,
Thanks for your kind response. In my case if I am using another errorPage
on my
JSP level it's still taking the errorPage defined on the web-application
level.
Even I am including some errorPage JSP which does not exist in the JSP
path, it
does not give me the error message. Is there some problem in it or JSP
specification specify the same.
Thanks..............
-ShriKant
A mailing list about Java Server Pages specification and reference wrote:
> From: Panagiotis Konstantinidis <[EMAIL PROTECTED]>@JAVA.SUN.COM on
> 12/14/2001 11:25 AM GMT
>
> 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.
>
> 14/12/2001 11:15:31, Sujit <[EMAIL PROTECTED]> wrote:
>
> >String a = "aa";
> >
> >the String object "a" is not created
> >that goes into the literal pool of the class ...
> >
> >btw
> >array.length is a property not a method
>
> Indeed it is. You are right. The array.length is a property. The length
> property adjusts itself everytime a new element is inserted in the array.
>
> >probably array.length also doesn't do any calculation.
>
> No more that the
>
> int l = arraStr.length;
> for (int j=0; j<ll; j++)
>
> is doing. The only thing they are doing then is to read the values from
> the memory. One is reading the value l and the other the value from the
> property length. Therefore I would expect more or less the same
assignm,ent
> times for the a +=
> "aa"; but the second one always seems to be slower.
>
> >still I'm not convinced with my reasoning,
> >can anyone else help us out.
> >
> >
> >----- Original Message -----
> >From: "Panagiotis Konstantinidis" <[EMAIL PROTECTED]>
> >To: <[EMAIL PROTECTED]>
> >Sent: Friday, December 14, 2001 6:04 AM
> >Subject: Re: OffBeat question...Java performance.
> >
> >
> >> Hmmm.. Using jdk1.4 under windows 2000 I got the error message:
> >>
> >> not a statement: String a = "aa";
> >>
> >> Declarign a String a; and changing the String a = "aa"; to a
+= "aa";
> it
> >worked but, despite my predictions, the first chunk of code run faster
> than
> >the second! I would expect the second to be faster... After running the
> >program twice doing a
> >> += "aa", the first loop yielded 45396 and 45075 respectively while the
> >second loop yeilded 46486 and 45255.
> >>
> >> Weird. Since the first loop has the overhead of recalculating the
> arary
> >length (even if it is a minimum overhead calculation) I would expect
> >different results...
> >>
> >> 14/12/2001 10:58:23, ShriKant Vashishtha <[EMAIL PROTECTED]>
> >wrote:
> >>
> >> >Hi,
> >> >
> >> >This is the actual code which I tested. I am using the IBM
> WebSphere3.53
> >> >JIT
> >> >enabled compiler. In my view also the second code should have been
> >faster.
> >> >But
> >> >it's the first code instead which is puzzling me.
> >> >
> >> >-ShriKant
> >> >
> >> >
> >> >
> >> >A mailing list about Java Server Pages specification and reference
> wrote:
> >> >
> >> >> From: Sujit <[EMAIL PROTECTED]>@JAVA.SUN.COM on 12/14/2001 05:35
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.
> >> >>
> >> >> Is this the actual code you tested and got the output ...
> >> >> or
> >> >> instead of the line String a = "aa";
> >> >> you had some other code ??
> >> >>
> >> >> actually, String a = "aa"; even if you loop does nothing ...
> >> >>
> >> >> I think both the for loop will not be executed at all ...
> >> >>
> >> >> the JVM should optimises the code ...
> >> >> and the time should be same ...
> >> >>
> >> >> BTW your second code snippet should be faster than the first one
...
> >> >>
> >> >> ----- Original Message -----
> >> >> From: "ShriKant Vashishtha" <[EMAIL PROTECTED]>
> >> >> To: <[EMAIL PROTECTED]>
> >> >> Sent: Friday, December 14, 2001 5:14 AM
> >> >> Subject: Re: OffBeat question...Java performance.
> >> >>
> >> >> > 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
> >> >> > > >
> >> >> > > >
> >> >> > >
> >> >> >
> >> >>
> >>
> >>
>
===========================================================================
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> >> >> > > >
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> >> >> > > > http://java.sun.com/products/jsp/faq.html
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> >> >> > > > http://www.jguru.com/faq/index.jsp
> >> >> > > > http://www.jspinsider.com
> >> >> > > >
> >> >> > >
> >> >> > >
> >> >> >
> >> >>
> >>
> >>
>
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> >> >> >
> >> >> >
> >> >>
> >>
> >>
>
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> >> >> > http://www.jguru.com/faq/index.jsp
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> >> >> >
> >> >>
> >> >>
> >>
> >>
>
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> >> >
> >>
> >>
>
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> >> >
> >> __________________________________________
> >> "It can only be attributed to human error"
> >> 2001 A Space Odyssey
> >>
> >>
> >
>
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> >>
> >
> >
>
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> >
> __________________________________________
> "It can only be attributed to human error"
> 2001 A Space Odyssey
>
>
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