Hi,
The following code runs (using v8.3) in about 1sec for me.

import module namespace p="xquery-30" at "https://raw.githubusercontent.com/expkg-zone58/ex-xparse/master/src/main/content/parsers/xquery-30.xqm";
p:parse-XQuery("2+2")

Using inspect:functions

let $f:= inspect:functions( "https://raw.githubusercontent.com/expkg-zone58/ex-xparse/master/src/main/content/parsers/xquery-30.xqm")
               [ local-name-from-QName(function-name(.)) = "parse-XQuery" and function-arity(.)=1]
return $f("2+2")

takes a very much longer time.
Is this a bug?

/Andy