Will continuously watching a function's value or using it in a directive like ng-show have a performance impact due to the function being called each cycle?
Could it be more efficient to simply use a boolean value to determine this, and update that value in various scenarios instead?
Indeed, when a watch acts as a function call, it will be triggered during each digest cycle. This can lead to a decrease in performance due to the added time needed for calling and executing the function compared to simply reading a value from an object.
However, if the function's execution time is minimal, the impact may not be significant; in some cases I have observed, it is considered acceptable practice.
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