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Grid performance when setting col width

We have an application that uses the grid.setColWidth() method to show or hide particular items when the user clicks a different view. The problem it seems is that the performance of the grid degrades based on the number of records the grid is actually displaying. What alternatives do I have?

Unfortunately there is no way to increase performance in your case. Hiding\showing columns is time-consuming task. 
Grid oriented on vertical datasets, with moderate number of column and not limited count of rows.There is no way to increase performance of grid with a lot of columns.