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Alex Queiroz <> writes:

> On Thu, Nov 18, 2010 at 8:40 AM, Mike Pall <> wrote:
>> [Case in point: 2 of the 3 leading open source JavaScript engines
>> have now switched to the 8 byte NaN-tagging value model that's
>> used by LuaJIT. Esp. Mozilla made extensive measurements before
>> going for such a major change of their code base. Having a compact
>> value representation pays off big time for dynamic languages.]
>      Sometimes I wonder how plain Lua can be so fast sticking only to
> standard ANSI C. That's an achievement. For instance, the VM dispatch
> uses the C switch statement, which is known to be slow.

Huh?  Why would it be "known to be slow"?  Have you taken a look at the
kind of code it generates?

David Kastrup