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Category Archives: Calculation
Manual Calculation No Longer Viral!
Excel has 3 basic calculation modes: Automatic, Manual and Automatic except Tables. But an Excel session can currently only have one Calculation mode (unless you are using FastExcel which allows open workbooks and their worksheets to have different Calculation Modes). … Continue reading
Only Calculating the Active Workbook
When you have more than one workbook open Excel has always recalculated all of the workbooks at each recalculation. That can be very painful if one or more of the workbooks are slow to calculate. Now the Excel Dev Team … Continue reading
Excel Screen-updating Performance Comparison.
The time that Excel takes to refresh the screen display can be a significant factor in overall processing speed. Things that affect screen updating Time My benchmarking workbook The workbook contains one sheet (Sheet1) with 4895 formulas and 1000 constants. … Continue reading
Short-circuiting in Array Formulas
The previous post demonstrated that IF and CHOOSE short-circuit but IFS and SWITCH do not. But following up a hint from Bill Wu that IF behaves differently in array formulas I decided to check whether it still short-circuits.(IF in array … Continue reading
Short-circuiting Excel Formulas: IF, CHOOSE, IFS and SWITCH
What is formula short-circuiting? Short-circuiting occurs in Excel formulas when an IF statement only evaluates the True part of the IF and skips the False part of the IF. For example in this formula: Because 1>2 evaluates to False the … Continue reading
FastExcel Version 4 – with Introductory Offer
After several man-years of development and a lot of beta testing FastExcel Version 4 has finally hit general availability! FastExcel V4 is a major rewrite of FastExcel V3 and provides many of the things you have been asking for: Support … Continue reading
Posted in arrays, Calculation, Debug formulas, Dynamic Arrays, Excel, Lookups, Memory, UDF, VBA
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Formula Explorer Pro Beta 4.2
After another 6 months on my quest to create the worlds best tool for exploring, validating, debugging and editing Excel formulas I have made Explorer Pro Beta 4.2 build 418.796 available. Hopefully this will be the final Beta! The improvements … Continue reading
Excel JavaScript API Part 2: Benchmark of Read/Write Range Performance
As an Excel Office Developer many of the Excel based applications I develop depend on reading data from Excel worksheet ranges, processing it and then writing the processed data back to a worksheet. In VBA the way to do this … Continue reading
Why Structured References are slow in Excel 2013 but fast in Excel 2016
Tables have a bad reputation for performance. Zack (Firefytr) Barresse (who wrote the definitive guide to Excel Tables with Kevin (Zorvek) Jones) recommends a limit of around 10K rows for tables if you want to keep performance reasonable. Prompted by … Continue reading
Excel Versions Screen Test (Updated): how fast is Screen Updating?
Gurs has an interesting benchmark he has been running on various systems and Excel versions over the years. His results seem to show a massive performance decline in later Excel versions. Looking at his benchmark and its VBA code you … Continue reading
Posted in Calculation, Formatting, Uncategorized, VBA
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