As of iOS 8 that&#x27;s no longer the case. JSC JIT compilation can be used in native apps. (It&#x27;s also used by WKWebView.)<p><a href="http:&#x2F;&#x2F;trac.webkit.org&#x2F;wiki&#x2F;JavaScriptCore" rel="nofollow">http:&#x2F;&#x2F;trac.webkit.org&#x2F;wiki&#x2F;JavaScriptCore</a><p>&quot;JavaScriptCore is an optimizing virtual machine. JavaScriptCore consists of the following building blocks: lexer, parser, start-up interpreter (LLInt), baseline JIT, a low-latency optimizing JIT (DFG), and a high-throughput optimizing JIT (FTL).&quot;