Date: Tue, 06 Apr 2010 07:31:46 +0100 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-questions@freebsd.org Subject: Re: perl qstn... Message-ID: <4BBAD552.4000006@infracaninophile.co.uk> In-Reply-To: <20100406015544.GA21119@guilt.hydra> References: <4BB8108A.9080104@FreeBSD.org> <1270371713.5861.98.camel@tao.thought.org> <86aatjnsts.fsf@red.stonehenge.com> <861vevnsow.fsf@red.stonehenge.com> <j2ya14066a01004040945z39191770k2f025752317fb14a@mail.gmail.com> <20100404163353.GA15198@guilt.hydra> <20100404201442.b456044e.freebsd@edvax.de> <o2oa14066a01004041148zd4ef8167q32b04d58daec8f9f@mail.gmail.com> <4BB9A5ED.3040309@infracaninophile.co.uk> <20100405173632.739a0c42@gumby.homeunix.com> <20100406015544.GA21119@guilt.hydra>
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On 06/04/2010 02:55:44, Chad Perrin wrote:
> 3. lazy evaluation, where the (result) is not evaluated until it is
> needed, which gives the interpreter plenty of time to notice there's
> an "unless" immediately following it
>
> Obviously, the "real" answer in the case of Ruby and Perl falls somewhere
> around 1.5, but 3 is still a believable-sounding excuse, and perfectly
> acceptable to me.
perl (and ruby) are byte-compiled languages, not interpreted languages
(like sh). All ordering variations on if and unless statements should
end up using pretty much the same sequence of opcodes once parsed and
compiled.
Cheers,
Matthew
- --
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
Kent, CT11 9PW
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