Efficiency of variables vs repeating expressions

Mon, 17 Dec 2012 18:24:22 GMT

Noob question here...

If I have multiple sheets/charts that use a common expression, is it more efficient to assign that expression to a variable and then reference the variable in the various sheets/charts than to have the expression repeated over and over in each object?

For example if I need to plot:

sum(bad_call)/sum(call_count) vs sum(good_call)/sum(call_count)

would it be better to create vCallCount =sum(call_count) and then plot

sum(bad_call)/vCallCount vs sum(good_call)/vCallCount.

Or is QlikView smart enough to recognize multiple instances of sum(call_count) and calculate it once?

Thanks,

Steve

Re: Efficiency of variables vs repeating expressions

hic — Mon, 17 Dec 2012 21:37:43 GMT

It is easier to maintain if you use a variable. But that is the only advantage, because QlikView is smart enough - in both cases - to recognize multiple instances of the expression. The result will be saved in the cache and re-used for the other instances the same expression. (Given that the data scope is the same).

HIC

topic Efficiency of variables vs repeating expressions in QlikView

Efficiency of variables vs repeating expressions

Re: Efficiency of variables vs repeating expressions