ColdFusion: More efficient structKeyExists() instead of isDefined()

Question

Which of these is more efficient in ColdFusion?

isDefined(\'url.myvar\')

or

structKeyExists(url, \'myvar\')

Answer 1

Use the one which is easier to read and best shows what you're doing.

The difference between the two is incredibly small, and very likely not worth worrying about at all.

Don't waste time optimising code unless you have a proven and repeatable test case which demonstrates the slowness.