I have been using the listlast() function to get the last element in varchar
strings such as:

"\1\3\8\12"

eg., <cfset mykey = listlast("\1\3\8\12", "\")>

I am wondering if this is the highest performing way of grabbing the last
integer in these strings? I can't immediately think of another way -- but
this a performance critical process and I want to make sure I am using thew
highest performance function  to get the result I need.

TIA

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