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List:       sbcl-devel
Subject:    Re: [Sbcl-devel] Way to compute object's size before allocation
From:       "Tobias C. Rittweiler" <tcr () freebits ! de>
Date:       2009-10-22 17:40:27
Message-ID: 87ocnztjhw.fsf () freebits ! de
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"Tobias C. Rittweiler" <tcr@freebits.de> writes:

> Luckily I only have to deal with sequences, so bit-vectors are enough to
> test for off-by-ones in my library, and they're quite space
> efficient. :-)

OTOH, the compiler itself does not like such amount of
data. E.g. compiling

  (defun foo (x)
    (aref #.(make-array (1- array-dimension-limit) 
                        :element-type 'bit
                        :initial-element 0)
          x))

results in a heap exhaustion for me. 

I think I've seen a ticket in the bug tracker asking for a way to turn
off constant propagation (which I guess is the culprit?) Is there a way
for that already?

  -T.


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