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Posted to user@poi.apache.org by "Humphrey, Jack" <JH...@coremetrics.com> on 2003/06/24 19:09:28 UTC
generating spreadsheets and memory utilization
Hi,
I am writing some code to generate speadsheets and hope to be able to use
POI. In my prototyping, I ran into the known issue of requiring large
amounts of memory to generate a large spreadsheet. To generate a 15MB xls,
it is taking up to 290MB of memory. I am writing a server application and
that level of memory utilization is not acceptable.
Do I have any alternatives? If I use the Cocoon serializer and write
Gnumeric XML instead, does it still require as much memory? Any tips?
Thanks.
Jack Humphrey
Re: generating spreadsheets and memory utilization
Posted by "Andrew C. Oliver" <ac...@apache.org>.
I'll be merging performance into the head very soon... When is very soon?
As soon as a I have a contiguous block of time to keep it all in my head at
once. :-)
"cvs co -r performance-branch jakarta-poi"
On 6/24/03 3:17 PM, "Danny Mui" <da...@muibros.com> wrote:
> Cocoon uses the same API at the end of the day.
>
> We have a performance branch that reduces memory by a good amount
> (40%?). Pull it down from CVS and see if the results are better?
>
> Humphrey, Jack wrote:
>
>> Hi,
>>
>> I am writing some code to generate speadsheets and hope to be able to use
>> POI. In my prototyping, I ran into the known issue of requiring large
>> amounts of memory to generate a large spreadsheet. To generate a 15MB xls,
>> it is taking up to 290MB of memory. I am writing a server application and
>> that level of memory utilization is not acceptable.
>>
>> Do I have any alternatives? If I use the Cocoon serializer and write
>> Gnumeric XML instead, does it still require as much memory? Any tips?
>>
>> Thanks.
>>
>> Jack Humphrey
>>
>>
>>
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>>
>>
>
>
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--
Andrew C. Oliver
http://www.superlinksoftware.com/poi.jsp
Custom enhancements and Commercial Implementation for Jakarta POI
http://jakarta.apache.org/poi
For Java and Excel, Got POI?
Re: generating spreadsheets and memory utilization
Posted by Danny Mui <da...@muibros.com>.
Cocoon uses the same API at the end of the day.
We have a performance branch that reduces memory by a good amount
(40%?). Pull it down from CVS and see if the results are better?
Humphrey, Jack wrote:
>Hi,
>
>I am writing some code to generate speadsheets and hope to be able to use
>POI. In my prototyping, I ran into the known issue of requiring large
>amounts of memory to generate a large spreadsheet. To generate a 15MB xls,
>it is taking up to 290MB of memory. I am writing a server application and
>that level of memory utilization is not acceptable.
>
>Do I have any alternatives? If I use the Cocoon serializer and write
>Gnumeric XML instead, does it still require as much memory? Any tips?
>
>Thanks.
>
>Jack Humphrey
>
>
>
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>To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
>For additional commands, e-mail: poi-user-help@jakarta.apache.org
>
>
>