Optimizing Microsoft Excel Performance with Large Files
Understanding the Issue
The client uses Microsoft Excel 365 and works with a file containing approximately 20,000 cells. The file takes up 90% of CPU usage and doesn't come to a close state.
Identifying the Cause
Excel's performance can degrade significantly when working with large files, especially when there are numerous calculations, formulas, and complex functions involved. The high CPU usage could be due to Excel recalculating the entire workbook repeatedly, causing a significant drain on system resources.
Addressing the Issue
To improve the performance of your Excel file, consider the following suggestions:
1. Reduce the number of calculations
Avoid using complex functions or formulas that require extensive calculations, as they can significantly slow down Excel's performance. If possible, use simpler functions or calculations to achieve the desired result.
2. Enable manual calculation
Excel automatically recalculates the entire workbook when changes are made. To reduce CPU usage, enable manual calculation by going to File > Options > Formulas > Calculation Options and selecting "Manual" under the "Calculation" section.
3. Use Excel's built-in tools
Excel provides various tools to help optimize performance, such as the "Analyze Workbook" feature, which can help identify and fix issues that may be causing slow performance. Additionally, the "Compact and Repair" option can help optimize the file size and improve performance.
4. Save the file in a different format
If the file size remains large even after implementing the above suggestions, consider saving the file in a different format, such as CSV or XML, which may be more suitable for large datasets and require fewer resources to process.