Excel Performance Problems

How to Fix Slow Updating Excel Linked Workbooks

Maira Mehtab Sep 20, 2026 868 views

Question details

The user is experiencing severe delays (approximately 10 minutes) when updating linked formulas between two large Excel workbooks containing thousands of records, despite testing direct links, imported data, and Power Query.

Product: Microsoft Excel
Device & OS: not provided
Scenario: Attempting to update cross-workbook data links and formulas for thousands of records.
Observed behavior: Updating the linked data takes an excessively long time, causing severe workflow interruptions and performance bottlenecks.

Before you start

Before attempting to migrate or restructure your data, ensure both workbooks are saved locally rather than on a network drive, as network latency can significantly worsen calculation times.

Solution 1Recommended

Migrate Large Datasets to a SQL Database

When Excel struggles with high-volume linked workbooks, moving the raw data to a dedicated database is the most robust solution for retrieving information efficiently.

Excel is not designed to function as a relational database for massive datasets. When direct links and Power Query both fail to provide reasonable update speeds, the structural limitation of workbook-to-workbook linking has likely been reached.

By utilizing a SQL database, the heavy lifting of data matching and retrieval is handled by the database engine rather than Excel's calculation thread.

Set up a relational database

Install or request access to a database system such as Microsoft Access, SQL Server, or MySQL to act as the primary repository for your large dataset.

Import data into the database

Export the thousands of records from your source Excel workbook and import them into a newly created table within your database.

Connect Excel via SQL

In your destination workbook, go to the 'Data' tab, click 'Get Data', select 'From Database', and establish a connection to retrieve the required information using a SQL query instead of cell-to-cell formulas.

Performance Boost: Using SQL to query exactly what you need rather than loading entire source files into Excel memory drastically reduces updating time.

Solution 2

Submit Performance Feedback to Microsoft

If standard optimization techniques have failed and you must keep the data in Excel, reporting the performance bottleneck directly to Microsoft can help drive future patches.

Free Microsoft Office alternative

Try WPS Office for Smooth Spreadsheet Processing

If you are struggling with slow performance and heavy resource usage in Microsoft Excel, WPS Office provides a lightweight, highly compatible alternative for handling complex spreadsheets and large datasets without bogging down your system.

1. Download and Install WPS Office: Visit the official WPS website, download the free installation package, and run it on your computer.
2. Open your workbooks: Launch WPS Spreadsheet and open your existing .xlsx source and destination files directly.
3. Test formula updates: Trigger a recalculation to evaluate the performance of data linking within the WPS lightweight environment.

Lightweight architecture ensuring faster loading times and smoother calculationHighly compatible with Microsoft Excel (.xlsx, .xls) and CSV formatsFamiliar user interface requiring zero learning curve for existing Excel usersFree to use for all essential spreadsheet and data management tasks

microsoft office alternative - wps office

Frequently Asked Questions

Why do linked workbooks in Excel become so slow to update?

Excel calculates linked formulas by establishing a connection and often loading data from the source file into memory. When dealing with thousands of records, this strains the CPU and memory limits, causing significant calculation delays.

Does opening the source workbook speed up the updates?

Yes. Opening both the source and destination workbooks simultaneously can often speed up calculation times because Excel can directly read the values from active memory rather than querying a closed file on your hard drive.

Can Power Query completely replace linked formulas?

Power Query is generally much more efficient than direct cell links (like VLOOKUP or XLOOKUP) for aggregating and merging large datasets. However, if the dataset size exceeds Excel's practical processing limits, even Power Query might experience delays, indicating the need for a true database.

Excel & Data Problems