Is VBA slowing down your workbooks? Do you spend hours starting at Excel while the macros finish running? As part of our Speedy Spreadsheet Week, today lets talk about optimization techniques for Excel VBA & Macros.
Optimization Techniques for Excel VBA & Macros
Lets break this in to 2 sections. (1) Quick optimization techniques & tactics (2) Optimization ideas for the long run
Quick optimization techniques & tactics for VBA & Macros
1. Turn off the features you don’t want before running your macro
This is easy pick. Even while your macros are running, Excel does a lot of work to update the spreadsheet screen, re-calculate the formulas, display alerts etc. You can turn-off these things before running your macro and this would instantly speed up your code.
This is how you can do it:
Application.ScreenUpdating = false
Application.DisplayAlerts = false
and use these lines at the bottom of your code to turn on the alerts & screenupdating.
Application.ScreenUpdating = true
Application.DisplayAlerts = true
Things to remember:
- If your macro changes a part of the spreadsheet (for example animation, chart updation), turning off screenupdating is not the way to go.
- Set calculation mode to manual if it is ok (application.Calculation =xlCalculationManual)
- Make sure your turn-on everything at the end of your macro.
2. Do not select cells & objects
Range("A1").value = 10 is faster than
Range("A1").select
Selection.Value = 10
Many times, we select cells, objects in our code because the macro recorder produced such code. There is no need to select cell(s) to access or update the value(s).
3. Use built-in functions & features if possible
Do not re-invent the wheel. If there is a built-in formula or function, use it instead of developing your own. Objects like Application have many useful methods that can do what you want. For example, if you want to check if 2 ranges overlap, you an use Application.intersect instead of doing the math yourself.
4. Loop carefully
Some people say avoid loops. I say loop carefully. If you can do the same thing without a loop, do it. Else, make the loop as light-weight as possible. Think thru the problem and see what is the best way to loop. Use below guidelines when you are writing macros with loops:
- To search: Use built in methods like search, find, VLOOKUP, MATCH to find a value in a range instead of looping thru it.
- To copy: Use array to range copy method instead of looping thru the array and copying one element at a time. See example below:
Dim myArr(1 to 1000) as String
'do something and have a lot of values in myArr
'Copy all values in myArr to worksheet range myRange in one step!
Range("myRange").Value = Application.WorksheetFunction.Transpose(myArr) - To copy: If you want to copy one range of values to another, just assign the values to second range instead of looping. See below:
Range("r2").value = Range("r1").value - To sort: Use Range.sort method or any other built-in methods to sort if possible.
- Nesting loops: avoid them if you can. Else, take coffee breaks when you run the 14,000 times loop inside 17,345 times loop.
5. Use with block
When you want to do several operations on same object, use With block. This keeps your code clean, tells Excel to cache the object for a bunch of operations.
VBA & Macros – Optimization techniques for long run
Optimization is never ending process. So a good coder constantly learns techniques & follows sound principles to keep her code light-weight & fast.
1. Copy good ideas
There are tons of good code samples, example macro code on various sites, forums or books. Copy any good ideas you come across to speed up your code than trying to re-invent.
2. Divide and conquer
Sometimes a macro is slow because you are trying to do everything in one go. Try doing the task in small chunks. These ideas help:
- Break down your application in to smaller modules / macros.
- Show progress to end users thru a progress bar, frequent screen updates or status messages.
- Render most important aspects of the output first. Then do the rest in background.
3. Less is better
The less code you have, the lesser memory you use, the lesser objects, variables you deal with, the faster your code becomes. As an exercise, take your most complex macro and see if you can delete a line. Repeat this until there is nothing else you can remove. That alone improves the performance. Some ideas to consider:
- Plan your code before you write it. Think thru all steps.
- Do not write code for lame users (unless you are developing something to sell to larger public). Most users in workplace are smart and reasonable. So you can lessen error handling etc.
- Release objects you no longer want to clear memory.
- Negotiate with users and reduce features if possible.
4. Learn & Practice
Merriam-Webster dictionary defines “optimize” as,
to make perfect … more
Learning & practicing is a proven path to perfection. You can learn by examining others code, reading books or helping others. Very soon, you see that your own code becomes better & faster.
5. Know when you cannot optimize
Optimization is like an itch. If you do not resist in time, it consumes you. For most of us running the code in shortest time is not the goal. Our goal is to meet end user needs & get things done. So as long as your code runs fast enough leave it in peace and move to next challenge.
Also, some times no matter what you do, your Excel macro takes time to run. May be its time you considered other languages / tools to solve the problem
More on Excel Optimization & Speeding up:
Read these articles too,
- Optimization & Speeding-up Tips for Excel Formulas
- Charting & Formatting Tips to Optimize & Speed up Excel
- Excel Optimization tips by Experts
- Excel Optimization tips submitted by our readers
How do you speed up your VBA Macros?
Personally, I try to stay away from VBA in my workbooks. But I find that with just a few lines of VBA, we can add a lot of wow factor, convenience to the spreadsheets. So, once in a while I add VBA to make my workbooks even more awesome. I also use VBA to clean up data, process it or generate reports. In such cases, by using above ideas I saved a lot of time & made my workbooks nimble.
What about you? How do you speed up your VBA & Macros? Please share using comments.
For more information on VBA & Macros
Check out our Excel VBA section or join our VBA Classes online program.
49 Responses to “Introduction to Slicers – What are they, how to use them, tips, advanced techniques & interactive reports using Excel Slicers”
Great article!
If you want to learn a bit more about using slicers in VBA, head over here:
http://jkp-ads.com/articles/slicers03.asp
Hi
I downloaded cube-formula-slicer-selection.xlsx.
Why is 'Report Connections' grayed out?
Great article!! Thank you very much... This post is one of the most helpful for my job!
Great Introduction. Thanks very much.
Wow! trying to use this on the reports that I have now. I really liked that Quantity and Amount Bar graph used on the pivot-multi tab, but for the life of me, I can't seem to replicate it from scratch. Help please?
[…] http://chandoo.org/wp/2015/06/24/introduction-to-slicers/?utm_source=feedburner&utm_medium=email… […]
This is awesome! I will favorite this page in my blog, http://www.exceltoxl.com
Since I've known slicers about 2-3 yrs ago, I've pretty much used them in every damn report I do. Everyone that sees it for the first time is like "This is the best thing ever. Did you do that using excel or something else?" 😀 My bosses are so used it that when they see a report from someone else that doesn't have slicers they send it to me to redo it :).
Couple of tips:-
Tip 1:
If for lack of space or say you want ability to search within a filter due to numerous values being present but still want it to connect to multiple pivot tables or charts then
1. Setup a pivot table with just the report filter
2. Create a slicer with the same field and tie that to all the pivot tables/charts that you want.
3. Just place it some out of sight.
Now you have a dropdown with all your values with search option plsu it is also connected to all your charts and pivot tables.
TIP 2:
In Excel 2013, slicers can be used with just plain tables as well. Not limited to pivot tables.
Congrats!
Nice content : )
Very comprehensive. Explained in an extremely simple way. I have been using Slicers for a while, but still learnt new things from this post. Thanks for sharing. Best wishes.
Awesome Explanation !!
I have joined this blog recently. Brilliant tools are available that I started using in my day to day work. Brilliant site. Thanks heaps.
[…] Read the full article here: Introduction to Slicers – What are they, how to use them, tips, advanced techniques & interact… […]
Oh wow. I've only just started using Excel 2010 and had no idea this even existed. It makes dynamic charts so much easier!
You are my Hero! I am working with PowerPivot due to the huge amount of data I have and could not use my usual tricks to get the scatter chart title to change. For some reason the CUBE function wouldn't work (who knows why, I don't have time to dig into it now) but your "dummy" solution did.
thankyouthankyouthankyou!
Clare
On a normal PivotTable filter, you can choose whether to allow multiple items to be selected or not. Is that possible with slicers (in Excel 2010)? I've had a look through the options and not found a way to do it yet!
Hi Stevie... this is not possible with slicers.
Just hold down control when you're choosing them...can then either click another (without control) and it will show only the new one, or click the filter with the red 'x' to revert back to all options.
Not a limitation that can be placed on the slicer but still a potential workaround depending on your needs.
Very comprehensive note on slicer. I haven't yet used ms excel 2010, but learnt Slicer tool very well
How should I apply Slicer in excel 2010 version, not able find options
as directed, could you please tell me that step by step
@Arif
In Excel 2010 slicers could only be applied to Pivot tables/Charts not Regular tables
@Arif
In Excel 2010 slicers could only be applied to Pivot tables/Charts not Regular tables
I have a longitudinal line graph with the count of exams scored at each level(1-4). I need a longitudinal line graph that shows the percentage for each level. I made my pivot with the count in the field settings with a calculation of % of row total. This works great until you add a slicer fo that you can look at one level at a time. When I do this, it shows as 100% because it seems to lose the rest of the row calculations. How can I set it up to show the percent. I do not have the option of adding it to my data table. I am using straight Pivot, not PowerPivot.
@Mary
I'd suggest asking the question in the Chandoo.org Forums http://forum.chandoo.org/
Attach a sample file with an example of what you are after, even hand drawn
Hi, thanks for these tips. Is it possible to link a slicer to *different data sets*? All my data sets have a "year_opened" and "month_opened" fields, and I'd like do a single filter and update everything at once. Is that possible?
Hi,
Can someone tell me how to format a date field in a slicer to tell July 2016 instead of 07/31/2016?
Thanks in advance.
Great post - easily explainable for non excel whiz.
Thanks for the slicers post. I'm knew to this feature so don't be to harsh on me 🙂
In the example bar chart graph: "Quantity breakup by Customer Profession and & Product category" you get a different picture depending on which area is chosen "East, Middle, North, South, West". That part I get. But the graph itself doesn't specify which region you are in.
Is it possible to put the filtered criteria into the Chart title. For example if I chose West, the title would read "Quantity breakup by Customer Profession and & Product category - West".
Is that possible? Just curious. Thanks
It is possible...I have this on a number of my reports.
1) create a pivot table with just the column your slicer is set on
2) assign the slicer to that pivot table
3) create a string in cell B3 (or wherever):
="Quantity breakup by Customer Profession & Product Category- "&A3
(assuming that A3 is the cell that the chosen region appears in)
4) click (once) on the graph title, then in the formula bar type =B3
As you change the slicers, B3 will update as will the chart title.
Couple of tips:
1) if you need to have a new line for the title, use CHAR(10) e.g.
="Quantity breakup by Customer Profession & Product Category"&CHAR(10)&A3
(this will have the region on a new line)
2) if multiple regions will be chosen, I've added in an IF statement
=IF(COUNTA(A3:A10)>1,"Multiple Regions",A3)
(I'm sure there are ways to concatenate the strings but for mine it could get up to 20 and that just gets ridiculous for the graph heading)
Just Wow
I am trying to create a duplicate dashboard using data in one workbook and creating a new workbook to place in a shared file for my coworkers. I have created a separate worksheet in the original workbook for the new pivot charts and slicers I want to use in the new workbook/dashboard. I don't want all of the source data in the new workbook, as it is very large. I am having trouble making new slicers work. They work in the original workbook, but when I copy them to the new workbook they don't work. Am I going about this the right way or is there an easier way?
Very good post! Helped a lot. Keep up the good work!
how can you prevent multiple selection in a slicer box? In short, in any slicer box, only one entry is allowed and not multiple entries.
Fairly new to forum's, hoping I'm not breaking a rule here, but I found this forum which seems to provide a solution:
https://wessexbi.wordpress.com/2014/03/17/just-one-slice-please/
I have 2 files. (1. .xlsx 2. .xlsm)
1 file contains all the pivot tables and charts. its also macro enabled.
2nd file contains the source data which is a .xlsx file.
but I am unable to run slicer on my 1st file.
can anybody help me out?
chandoo.org: one of my favourite Excel sites for years.
Slicers tutorial: excellent as usual.
Animated gifs: sorry, but REALLY distracting!! Especially with two on the same screen. Is there any way they can be activated only when we click on them, or something?
Hi Team,
I have inserted a slicer to a pivot table with 4 fields...I need to add another field for the same slicer...help me with this..
First of all I would like to say terrific blog!
I had a quick questio in whiich I'd like to ask if you don't
mind. I was intereested to know how you center yourself and clear your head
before writing. I've had a hard time clearing my mind in getting my ideas out there.
I do enjoy writing however it just seems like the first 10 to 15 minutes are generally lost simply just tryying to figure out how
to begin. Any recommendations oor tips? Many thanks!
Hi All
Im trying to connect a slicer to 2 pivot tables with different sources
Both data tables have been sorted and have duplicates
ie
Table 1
Name Week FTe
A 1 7.2
A 2 7.3
B 1 7.3
B 2 7.3
Table 2
Name Month Fte
A Jan 2.6
A Feb 3.2
A Mar 4.4
B Jan 2.2
B Feb 6.4
B Mar 2.2
etc
I have created 2 pivot tables and have sorted it out the way i want with charts etc
Now all i want is to connect the Name Slicer to be connected to both of those pivot tables but problem is they have duplicates and are from different tables/sources
how can i connect/add this to a data model and connect to my name slicer?
Im sure it maybe something simple but minds not with it
So in short 1 to connect 1 slicer to 2 different pivots from different sources but not all pivots (There are dups in both) - as shown in the example
Thank You
Hi H
This is how you can do it. Create a third table with all slicer options (in this case it would be Name column) with one row per unique value. Now add this table to your source list. Then link all two tables via this third table thru Data ribbon > Manage relationships feature. Finally add a slicer on this third table column and link the slicer to both pivot charts.
Please note that you need to construct the tables and charts after data model is created.
See this page for more explanation on how to use relationships - https://chandoo.org/wp/introduction-to-excel-2013-data-model-relationships/
Hi,
Using Cube Value with Slicers is great. I am new to cube value, but it is so powerful. I am stuck on an issue where I want to filter on a slicer for all values except 1 and the slicer has thousands of values. I get #N/A in the results, when trying to do this. Any ideas on how to do an exception calc or how to get around this with the multi select slicer functionality?
Thanks in advance.
Cyleste
@Cyleste... thanks for your comments and welcome to Chandoo.org. You can use DAX to calculate such things as Excel pivot tables alone cannot function like the way you want. You can use DAX formula EXCEPT() to achieve this. For example,
=CALCULATE(SUM(data[sales]), EXCEPT(ALL(data[filter_column]), VALUES(data[filter_column]))) can tell you the sum of [sales] column in the data table by ignoring slicer selected values.
Hope that helps.
Hi Chandoo,
Thank you for your quick reply. I am not familiar with DAX but it sounds like I won't be able to apply the calculation you provided after converting the power pivot to excel formulas via OLAP.
Cyleste
Thanks Chandoo, I like yours tricks & always I use slicers. Regards from México.
Hi Chandoo,
I have a lot of text in the slices (Pivot table). The text is not completely visible. What should I do?
Please Help
Thanks
Hi Girish,
Slicers are useful only for items with short text, for ex: categories, product names etc. For longer values, you are better off using form controls for interaction - Here is an overview of form controls Form Controls – Adding Interactivity to Your Worksheets
Thanks so much for this, it's brilliant! I think it's almost there - I've actually followed the steps on the example linked in my post. I just can't get it to filter properly; it just returns 0 when I add a date into Cell O2. Should I be doing it differently?
slicers dont work with non-admin roles in OLAP Pivot Tables