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From Chris Nokleberg <ch...@sixlegs.com>
Subject Re: Improving POIFS performance
Date Thu, 09 Oct 2003 15:27:07 GMT
On Thu, Oct 09, 2003 at 09:03:02PM +0930, Glen Stampoultzis wrote:
> At 03:25 PM 9/10/2003, you wrote:
> >Yes. Although the changes to POIFS will not have a tremendous initial
> >impact on performance since HSSF will still be buffering all of the
> >records (I have ideas for changing that, but it is a lot of work).
> I was suspecting this to be the case.  I was hoping that the performance 
> would be comparable at least and that memory usage would be the same or 
> better.  If this is the case we could pick your implementation and run with 
> that and then work towards providing an implementation of HSSF that can 
> take better advantage of the new API.

Memory use should probably be ~50%, since only HSSF will be buffering,
instead of HSSF *and* POIFS. Also, the streams you don't care about
won't have to be read in. Performance should improve at least a little
as a result.


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