\\ Version #1 upgraded to complete function. Practically the same.
reverse(str)={return(concat(Vecrev(str)))}

{
\\ TEST2
print(" *** Testing reverse from Version #1:");
print(reverse("ABCDEF"));
my(s,sr,n=10000000);
s="ABCDEFGHIJKL";
for(i=1,n, sr=reverse(s));
}