https://bz.apache.org/bugzilla/show_bug.cgi?id=63443
Bug ID: 63443
Summary: Writing a large spreadsheet 4x slower after upgrading
to 4.0+
Product: POI
Version: 4.0.0-FINAL
Hardware: Macintosh
Status: NEW
Severity: normal
Priority: P2
Component: XSSF
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Whilst upgrading from 3.17 to 4.1.0 we experienced a severe reduction in the
performance of writing a larger spreadsheet we have in our application.
3.17 took ~4 seconds
4.1.0 took 17-20 seconds (same for 4.0.0 and 4.0.1)
After doing some digging it turned out XSSFRow.java onDocumentWrite method
started using a lot more CPU time now.
This eventually led to us looking at this patch r1825277
It looks like this performance optimisation was removed intentionally as part
of bug #62130
Is there a way around this significant performance penalty?
As it's likely to be deemed unacceptable for our users.
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