SpreadsheetML

Subject – Calculation Chain

Calculation Chain

• The order in which cells were last calculated

• Does not include dependency information• Calc order will change, based on:

– Dependency information– What cells have changed– Multi-threading optimizations

• Doesn’t force application to calculate in any particular order

Multi-Threaded Calculation

• “Child Chain” (@s) flags indicate subsets of the calculation chain that can be calculated concurrently– Not figured using dependencies, only using

calculation order• “Dependency Level” (@l) flags indicate

where calculation must wait for all concurrent threads to complete before continuing with calculation

Example Workbook

1st Calculation

2nd Full Calculation

20th Full Calculation

Disclaimer

This presentation is for informational purposes only, and should not be relied upon as a substitute or replacement for Microsoft formal file format documentation, which is available at the following website: https://msdn.microsoft.com/en-us/library/cc313118(v=office.12).aspx. Any views or opinions presented in this material are solely those of the author and do not necessarily represent those of Microsoft. Microsoft disclaims all liability for mistakes or inaccuracies in this presentation.