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Re: Make built-in list functions continuous

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From:
Dave Mitchell
Date:
April 2, 2008 05:46
Subject:
Re: Make built-in list functions continuous
Message ID:
20080402124555.GT15918@iabyn.com
On Tue, Apr 01, 2008 at 02:49:47PM +0100, Nicholas Clark wrote:
> I don't know how long it took Dave to
> implement in-place sort (`@glurp = sort @glurp`)

My vague recollection is that it was quite hard, and then I broke
something (can't remember what now).

Generally, optimisations that involve examining an area of the optree looking
for a particular pattern and replacing it with something else, are hard
to do, and are very fragile - a slight change to the optree (something as
trivial as an op_null added or removed by some other fix), and the
optimisation gets inadvertently disabled, or worse, breaks things.

-- 
Standards (n). Battle insignia or tribal totems.
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