Скачать или смотреть How to Optimize Your VBA Code for Speed and Automation in Excel

Learn how to improve the efficiency of your VBA code and automate processes in Excel, so you can save time and enhance productivity.
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This video is based on the question https://stackoverflow.com/q/76250391/ asked by the user 'EmperorFeng' ( https://stackoverflow.com/u/21048428/ ) and on the answer https://stackoverflow.com/a/76250520/ provided by the user 'k1dr0ck' ( https://stackoverflow.com/u/16220410/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Optimize Your VBA Code for Speed and Automation in Excel

If you've been working with VBA code in Excel, you may have encountered a common problem: performance issues as your dataset grows. Specifically, your code might run relatively quickly when working with a small number of rows, but as you fill more cells, you might find the execution time becoming unacceptable. In this blog, we'll discuss how to improve the efficiency of your VBA code and automate it so it runs as soon as data is entered.

Understanding the Problem

The original VBA code provided is designed to fill specific cells in a row based on the data input in another cell. However, the performance starts to lag considerably as the number of active rows increases, which is a frequent issue faced by Excel users. The goal here is to not only speed up the code but also have it run on its own whenever new data is entered into a specified column.

Solution Overview

To achieve the desired outcome, we will:

Speed up the code execution: This is done by working with arrays instead of directly manipulating cell values, reducing the number of read/write operations to the worksheet.

Automate the code execution: Instead of running the macro manually each time, we will set it up to execute automatically when there is a change in the target range.

Speeding Up Your VBA Code

Let's break down the modifications made to the original code for performance improvement.

Using Arrays

Instead of accessing each cell individually, we can load the required range into an array, process it in memory, and then write it back to the worksheet in one go. Here's the optimized code:

[[See Video to Reveal this Text or Code Snippet]]

Automating the VBA Code Execution

To automate the execution of the code, we need to add a specific event handler that triggers our macro whenever there is a change in the intended range (Column A in this case).

Using Worksheet Change Event

Add the following code to the ThisWorkbook module:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By refactoring the original code to utilize arrays and implementing an event handler for automatic execution, we've significantly enhanced the performance and usability of the macro. This approach ensures that your data processing is efficient, even as datasets grow larger.

Takeaways

Use arrays to minimize direct cell manipulations for improved performance.

Automate code execution to enhance user experience and eliminate the need for manual triggers.

Now that you have these improvements at your fingertips, you can handle large datasets in Excel effortlessly!