in reply to
Perl 5 Optimizing Compiler, Part 4: LLVM Backend?
Having closely followed these threads, plus based on some private correspondence, my gut reaction is that there is no system discussed so far which meets all of the following criteria:
- handles all (or practically all) existing Perl syntax and semantics;
- doesn't require modification of existing Perl source (e.g. requiring you to add type declarations);
- provides an order-of-magnitude speed-up for general Perl code; (e.g. 5X rather than 10%);
- doesn't require a huge coding effort (of a similar magnitude to implementing parrot and perl6)
I'm not saying at this point that all of the proposals definitely fail these criteria; rather that no-one has yet explained any proposal to me in such a way that I have a real "Ooh I see how that might work!" epiphany; and my suspicion is that no-one ever will.