hi,
i too wondered about this. i agree with you that Sun's suggestion of
not using object pooling should not be applied in all cases. so let me
point out a specific case. i guess Request and response objects are
recycled and in the recycle method, all variables are cleared, if they
are collection objects, or are set to null. this means you anyway end up
creating all the objects again. you end up saving some memory allocation
overhead of creating the request object and may be some collection
objects. But this is at the cost of doing all the stuff in the recycle
method and the added complexity in the code.
i guess this is what the sun's site speaks about that memory allocation
is no more costly, especially in the newer jvms(say 1.4.2).
so my specific question is that do we need to recycle request and
response objects when using jdk1.4.2?
thanks,
nishant.
On Fri, 2004-01-30 at 00:53, Filip Hanik wrote:
> As Yoav said, pooling is a question of how expensive it is to create them.
>
> Also to add in there are many more factors to consider
>
> 1. how expensive is it to GC in a non pooled environment
> 2. how expensive is it to synchronize to keep your pool thread safe
>
> so it all becomes a question of the scenario that you have, it is not
> general
>
> Filip
>
>
> ----- Original Message -----
> From: "Shapira, Yoav" <[EMAIL PROTECTED]>
> To: "Tomcat Developers List" <[EMAIL PROTECTED]>
> Sent: Thursday, January 29, 2004 11:11 AM
> Subject: RE: Design Question in TomCat 5
>
>
>
> Howdy,
>
> >But from Sun's web page, it said do not pool objects. So my question is
> "Is
> >it a good idea to do object pooling" for the sake of performance
> >improvement?
>
> "Do not pool objects" is an overly general tip. If objects are
> expensive to create, pooling them is a classical way to enhance
> performance of a system.
>
> Yoav Shapira
>
>
>
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