Performance Issue: Adding Multiple Rows to a Word Table Using NPOI Takes Excessive Time

[mysoftlab]

NPOI Version

2.7.2

File Type

• XLSX
• XLS
• DOCX
• XLSM
• OTHER

Upload the Excel File

template.docx

Reproduce Steps

Reproducible code
Demo.zip

1. Create a Word document with a table using NPOI.
2. Use NPOI to programmatically add multiple rows (e.g., 12 rows) to the table
3. Observe the time taken for the operation to complete.

Issue Description

The operation takes an excessive amount of time, with 12 rows taking over 30 seconds to be added. This performance issue becomes more pronounced as the number of rows increases.The performance bottleneck appears to be in the CT_Row.Copy method,This method seems to have inefficiencies when handling multiple row copies, leading to the observed slowdown.