Why does vba run so slow




















The following example code shows how a range can be used to read and write the values once, instead of reading each cell individually. There are different ways that you can retrieve values from a cell, and which property you use can make a different in the performance of your code. Text is commonly used to retrieve the value of a cell — it returns the formatted value of a cell. Getting the formatting of a cell is more complex than just retrieving a value, and makes.

Text quite slow. Value is an improvement over. Text, as this mostly gets the value from the cell, without formatting. However for cells formatted as a date or currency,.

Value2 gives the underlying value of the cell. As it involves no formatting,. Value2 is faster than. Value when processing numbers there is no significant difference with text , and is much faster using a variant array. When you use the Macro Recorder to record operations that use copy and paste, the code will use the copy and paste methods by default.

However, within VBA code, it is much faster to bypass the clipboard and use internal operations instead. By default, copying will copy everything, including formulas, values and formatting.

You can make copying faster by only copying values or formulas, without the formatting. The following example shows the code before and after making the change to bypass the clipboard. Setting Option Explicit requires all variables to be declared and will give compile errors if an undeclared variable is used. This helps catch incorrectly typed variable names and improves performance with all variable types being defined at compile time, instead of being inferred at runtime.

We hope that this has helped highlight some of the ways that you can make your macros run faster. It is possible the code disables the various settings, but the macro crashes before re-enabling these settings. To fix this, you will need to run the code to enable these settings again.

Charles Williams founded Decision Models in to provide advanced consultancy, decision support solutions, and tools based on Microsoft Excel and relational databases. Charles is the author of FastExcel, the widely used Excel performance profiler and performance toolset, and co-author of Name Manager, the popular utility for managing defined names.

For more information about Excel calculation performance and methods, memory usage, and VBA user-defined functions, visit the Decision Models Web site.

He runs the website JKP Application Development Services site , where you can find an interesting collection of articles, training events, and utilities. Click here to open that special page in a new browser tab. ExcelTips is your source for cost-effective Microsoft Excel training.

This tip applies to Microsoft Excel , , , , , and Excel in Office With more than 50 non-fiction books and numerous magazine articles to his credit, Allen Wyatt is an internationally recognized author. He is president of Sharon Parq Associates , a computer and publishing services company.

Learn more about Allen Enter a value into a cell and "poof! What's going on, and how can you fix it so that Templates allow you to define and collect many formatting settings that control how your documents appear. Getting a Need to get rid of all the tab stops in a particular document? It's easy to do when you apply the technique outlined in Solve Real Business Problems Master business modeling and analysis techniques with Excel and transform data into bottom-line results.

This hands-on, scenario-focused guide shows you how to use the latest Excel tools to integrate data from multiple tables. The personal macro workbook is a great place to save your macros that you want to use with any workbook. The personal One of the most common ways of creating macros is to use Excel's macro recorder.

This tip shows how easy it is to use the Enter your address and click "Subscribe. Your e-mail address is not shared with anyone, ever. Maximum image size is 6Mpixels. My code involves a lot of loops and nexted functions, manipulating strings, cutting them into pieces and comparing these pieces to strings stored in arrays of size x Calculation , two things I've discovered significantly improve the speed are: Change the cursor to xlWait prior to your operation, and back to xlDefault once done.

Exception: Application. Value2 instead of. Value Sheet1. Range "A1". Drew Chapin Drew Chapin 7, 5 5 gold badges 54 54 silver badges 78 78 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta. Now live: A fully responsive profile.

Related Hot Network Questions. Question feed. Learn anything from creating dashboards to automating tasks with VBA code! This topic has been written about in detail many times, but those who are new to VBA or even computer coding in general, may want a simple approach without all the nerd jargon.

If you began reading this article in hopes to find "10 ways to speed up your code", I suggest you check out one of these great articles:.

There are two steps. First, you have to copy the two subroutines below and paste them at the top of a module within your VBA Project. EnableEvents Application. Calculation Application. DisplayPageBreaks ActiveSheet. Next, you will need to Call the respective subroutines at the beginning and end of your macro. An example could look something like this:. The above VBA code I just shared with you is simply turning off settings from within your Office application that want to use your computer's memory to report out on your computer screen every single thing your macro is doing in real-time.

This slows your computer's processing power down and in turn decreases your computer's ability to run your code as fast as it can. Your computer is simply trying to do too many things at once. Let's look at these settings in detail to appease those of you who want to know why this code works. The first macro I ever ran was a co-worker's that took 30 minutes to finish executing it did a lot of stuff and was very poorly written.



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