Optimizing Excel formulas - SUMPRODUCT vs SUMIFS/COUNTIFS
问题 According to a couple of web sites, SUMIFS and COUNTIFS are faster than SUMPRODUCT (for example: http://exceluser.com/blog/483/excels-sumifs-or-sumproduct-which-is-faster.html). I have a worksheet with an unknown number of rows (around 200 000) and I'm calculating performance reports with the numbers. I have over 6000 times almost identical SUMPRODUCT formulas with a couple of difference each times (only the conditions change). Here is an example of what I got: =IF(AFO4>0, (SUMPRODUCT((Sheet1