Interactive curve draw in Spotfire

I have a data function which generates a table of pairs, an array column of months 0-480 and an array column of rates e.g. Months = new int[] {1,2,3,4,5,6,7 ,8,9,10}, Rates = new double[] {2.4, 4.7,5.0, 0.0, 6.8 etc} The data function is driven by 4-6 parameters to generate the curve pairs. The purpose here is for the user to interactively 'tweak' the parameters (document properties) and see the curve change in the visualisation (Line by column values). Unfortunately, this approach (although it works) from a user perspective seems slow (not responsive enough). Change a value, run the data function, return the table of pairs, then draw the Line from column values curve. Does anyone have an alternate suggested approach/method that might make this curve 'tweaking' more responsive

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