d to use heap
memory when necessary for internal workspace when recursing, though recursive
function calls are still used.
</P>
<P>
The "match depth" parameter can be used to limit the depth of function
recursion, and the "match heap" parameter to limit heap memory in
<b>pcre2_dfa_match()</b>.
</P>
<br><a name="SEC4" href="#TOC1">PROCESSING TIME</a><br>
<P>
Certain items in regular expression patterns are processed more efficiently
than others. It is more efficient to use a character class like [aeiou] than