ry to run <tt>require("jit.opt").start()</tt>,
which was one of the ways to enable optimization.
</p>

<h2 id="jit_util"><tt>jit.util.*</tt> &mdash; JIT compiler introspection</h2>
<p>
This sub-module holds functions to introspect the bytecode, generated
traces, the IR and the generated machine code. The functionality
provided by this module is still in flux and therefore undocumented.
</p>
<p>
The debug modules <tt>-jbc</tt>, <tt>-jv</tt> and <tt>-jdump</tt> make
extensive use of these functions. Please ch