reads on the host operating system, which may be either pthreads on
POSIX systems or Windows threads. Each thread has its own Janet heap, which
means threads behave more like processes that communicate by message passing.
However, this does not prevent native code from sharing memory across these
threads.  Without native extensions, however, the only way for two Janet threads
to communicate directly is through message passing.
</p>
<h2>Creating threads
</h2>
<p>Use <code class="mendoza-code">(thread/new fun