What I Learned Making My Own JIT Language
<i>Sure, there are things that can be &quot;poison pills&quot; for performance, even in JITs. For example, another reason why my fib benchmark beats V8 is that V8 has to continually check if the fib function was redefined as a deoptimization check. I don&#x27;t allow that in Vaiven, so I can produce faster code. Dart was designed to have fewer of these poison pills, for instance.</i><p>Note to language designers: Reduce your language&#x27;s poison pills. For those which can&#x27;t be avoided, make them easy to profile!