I will certainly review the articles, however, automatic calculation is
already turned off and is only turned on at the end just before saving the
file. The problem seems to be the actual insertion of the data via OLE
automation. I will look at the articles however and get baqck to you.
--
John Austin
"Jialiang Ge [MSFT]" wrote:
Hello John,
From your post, my understanding on this issue is: you wonder why the
automation of Excel 2007 looks slower than that of Excel 2003, and how to
improve its performance. If I'm off base, please feel free to let me know.
According to the MSDN article
http://msdn2.microsoft.com/en-us/library/aa730921.aspx (Improving
Performance in Excel 2007), the performance issue is caused by the
increased limits in Excel 2007. The Excel 2007 "Big Grid" increases the
maximum number of rows per worksheet from 65536 to over 1 million, and the
number of columns from 256 (IV) to 16384 (XFD) (See
http://msdn2.microsoft.com/en-us/lib...007excelPerf_B
igGridIncreasedLimitsExcel). When we create large worksheets, it is easy to
build them in a way that causes them to calculate slowly. However, by using
a straightforward set of techniques, we can speed up most slow-calculating
worksheets by a factor of 10 or 100:
http://msdn2.microsoft.com/en-us/lib...007excelPerf_M
akingWorkbooksCalculateFaster (Excel 2007 Performance Improvements)
http://msdn2.microsoft.com/en-us/lib...007excelPerf_F
indingPrioritizingCalculationBottlenecks (Finding and Prioritizing
Calculation Bottlenecks)
http://msdn2.microsoft.com/en-us/lib...007excelperf_E
xcelPerformanceImprovements (Excel 2007 Performance Improvements)
http://msdn2.microsoft.com/en-us/lib...007excelperf_T
ipsOptimizingBottlenecks (Tips for Optimizing Bottlenecks)
For instance, we could utilize the new feature of Excel 2007:
multi-threaded calculation to improve the calculation speed, or temporarily
set the calculation mode as "Manual" so that the formulas are only
recalculated when you request it. You can also apply these techniques as
you design and create worksheets to ensure that they calculate quickly.
The Excel development team has been spending a lot of time tuning Excel
2007's calculation performance to make it as fast as possible. (See:
http://blogs.msdn.com/excel/archive/...28/540939.aspx Help us make
Excel 2007 faster¡Â*). Here are a few more posts about Excel performance
from Excel team blog:
http://blogs.msdn.com/excel/archive/...03/488822.aspx Multi-threaded
calculation in Excel, or "how calculation can become much faster in Excel
12"
http://blogs.msdn.com/excel/archive/...ce-new-whitepa
per-available.aspx Excel Performance - New Whitepaper Available
http://blogs.msdn.com/excel/archive/...26/474258.aspx Some other
numbers ...
Please try the above techniques according to your specific situation, and
let me know if they can help you improve the performance. For any other
concerns or questions, please feel free to let me know.
Regards,
Jialiang Ge , remove 'online.')
Microsoft Online Community Support
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