Bottleneck Detector


Is your spreadsheet slow? Do you want to know which part of it is the bottleneck? If so, Bottleneck Detector is your best friend!
  1. Bottleneck Detector detects slow worksheets among all the worksheets of your spreadsheet.
  2. It can also be finer-grained and detect slow ranges inside your workbook.
  3. As a result, amending the bottleneck of your spreadsheet will improve its performance.

Elements in the Task Pane

MUST-DO Before Running the Tool



You could download the following examples and try to find their bottleneck:

Upcoming Features

We use trello to manage our product road-map and be interactive with you. Please feel free to make a feature request there, or to vote for upcoming features, eg.,:


For any question and issue, please write an email to: [email protected].