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.

Dave.

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