I mean, there&#x27;s definitely a good argument that V8 is most advanced, but, for example, JSC is the only one that has the LLVM &#x27;fourth tier&#x27;, and it shows on asm.js benchmarks, where it mostly beats V8 (loses to Firefox, but that has asm.js-specific code while the others don&#x27;t):<p><a href="http:&#x2F;&#x2F;arewefastyet.com&#x2F;#machine=29&amp;view=breakdown&amp;suite=asmjs-apps" rel="nofollow">http:&#x2F;&#x2F;arewefastyet.com&#x2F;#machine=29&amp;view=breakdown&amp;suite=asm...</a><p>So I think the question of &quot;most advanced&quot; is basically subjective.<p>Don&#x27;t get me wrong!  I would <i>strongly</i> prefer if iOS allowed any JIT to be used.  I just think calling the one that can be used &quot;most advanced&quot; is not wrong per se.