ng string,
a lot of memory is required. Consider now this rewritten pattern, which matches
exactly the same strings:
<pre>
  ([^&#60;]++|&#60;(?!inet))+
</pre>
This runs much faster, because sequences of characters that do not contain "&#60;"
are "swallowed" in one item inside the parentheses, and a possessive quantifier
is used to stop any backtracking into the runs of non-"&#60;" characters. This
version also uses a lot less memory because entry to a new set of parentheses
happens only when a "&#60;" char