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Re: [Chicken-hackers] [PATCH][for chicken-5] Remove srfi-13

From: John Cowan
Subject: Re: [Chicken-hackers] [PATCH][for chicken-5] Remove srfi-13
Date: Thu, 11 Sep 2014 13:16:04 -0400
User-agent: Mutt/1.5.20 (2009-06-14)

Peter Bex scripsit:

> As you know, one of the problems with SRFI-13 is that it's extremely
> inefficient.  It would make sense if user code can also rely on faster
> alternatives.  One of the rules of CHICKEN optimization has long been
> to avoid SRFI-13 if you can.

Other than the polymorphism (which should be flushed) what are the known
specific problems?  Also, have any of Olin's suggestions from the end of
<> been applied?  A portable
interface doesn't have to be implemented solely with portable code.
In particular, Olin notes that using an ER macro for `let-optionals*`
and replacing `string-ref` and `string-set!` with unsafe equivalents in
the loops and relying on the higher-level safety checks are both wins.

John Cowan        address@hidden
They do not preach that their God will rouse them
A little before the nuts work loose.
They do not teach that His Pity allows them
to drop their job when they damn-well choose.
                --Rudyard Kipling, "The Sons of Martha"

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