## Calculation Efficiency

### Array Formulas

Chandoo had some posts on speeding up Excel worksheets, one of the posts focuses on formulas and another he let the general readers make their suggestions. I made the suggestion that people use array formulas. But most of the other suggestions said not to use array formulas since they slow down your spreadsheet. Needless to say, I was a bit confused, I have seen quite the performance boost from using array formulas.
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