Is expression runScript any faster than using a script transform?

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I know expressions are the most efficient way of generating a property binding, but I'm assuming that's not true when using runScript to invoke a library script...?

Also, the documentation isn't very clear about what passing a poll rate of 0 means. I assume that's the way to get it to only execute once?

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Stay away from runScript() unless it is around single digit execution time (ms). Otherwise, my understanding is you could block other tag executions.

Edit:
If you need more complicated logic in an expression, check out the Integration Toolkit by pturmel.
It can do iteration, debugging, and more. Automation Professionals' Integration Toolkit Module - 3rd Party Modules - Inductive Automation Forum

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In my testing, a runScript call in an expression is significantly faster than a transform.

I've pretty much stopped using transforms, and minimized scripted bindings. (My Integration Toolkit is essential to achieve that latter goal.)

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