You can also do a backwards iteration if order doesn't matter:
for (int i = size() - 1; i >=0; i--)
----- Original Message -----
From: "fredt" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Thursday, September 05, 2002 5:41 AM
Subject: Re: [Hsqldb-developers] HSQLDB 1.7.0 - Performance audit
> Hi Loic,
>
> Thanks for the effort. I hope you continue contributing to the project.
>
> >-1-
> >int size = Vector.size();
> >for( int i = 0; i < size; i++ )
> >{}
> >
> is better than
> >
> >for( int i = 0; i < Vector.size(); i++ )
> >{}
>
> We have used the first form in all places that are performance sensitive.
> The second form is sometimes used in very infrequently-used methods.
>
>
> >Vector is a synchronized object, ArrayList do the same but is not
> >synchronized. Although a RDBMS must provide transaction isolation and
thus
> >Vector might be useful to do that, I think that sometime, hsqldb could
use
> >ArrayList objects instead
> >of Vector. This remark applies to Hashtable vs HashMap too.
>
> We are aware of the impact of synchronization. As a result David Nordahl
has
> developed our implementations of List objects which do not use
> synchronization. Please download the 1.7.2 ALPHA B source package from the
> file download section to see the changes.
>
> Fred Toussi
>
>
>
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