Perl 5 doesn't run slower than C because it lacks a JIT. Perl 5 runs slower than C because it's designed to be more flexible than C and that flexibility is not free. That flexibility includes but is not limited to:

Add to that the facts that LLVM was not designed for dynamic languages and that Perl 5 was not designed for static optimizations. Using LLVM from Perl 5 without changing the internals of the Perl 5 VM probably will speed up code that's already written in C but certainly without addressing most of the reasons why Perl 5 code can run slower than C.

In reply to Re^4: Perl 5 Optimizing Compiler, Part 4: LLVM Backend? by chromatic
in thread Perl 5 Optimizing Compiler, Part 4: LLVM Backend? by Will_the_Chill

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