Difference between revisions of "Calc/Proposal DataPilot byIBM"
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+ | | colspan="2" bgcolor="#cccccc" | '''Specification Status''' | ||
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+ | | width="150" | '''Author''' || [[User:wangxum|Wang Xu Ming]] | ||
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+ | | width="150" | '''Last Change''' || See wiki history | ||
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== Background== | == Background== |
Revision as of 08:50, 23 June 2009
Specification Status | |
Author | Wang Xu Ming |
Last Change | See wiki history |
Background
Low performance when update a datapilot table Environment: Hardware: IBM T30 CPU: 2.4 GHz Memory:1.0 GB Operation System: Window XP SP2 Sample file: The datapilot table's source data have 5000 rows. File:Pvt test result.jpg Crash Insert two field into row area ( Each field have about 1000 members ),it causes freezing and crash.
Problem Description
Allocate a lot of abundant data For a simple datapilot table: Member A1 in L1 field will create a array for all members {B1,B2,B3}. But only B1 is visible and valid. Allocate too much memories Every member's data is stored in a big structure. Set too many times of border styles for output area Some borders are set twice or more.
Solution
Data Source buffer A document stored a source buffer array. Every table have a buffer id. The datapilot table can use the same id if they have same data source. In the buffer, the members of a field can be identified by an id( the sorted index ). Then in the output table's algorithm the ScDPItemData structure is replaced by an id. Only allocate visible member Enhance the algorithm of setting border style