Alvaro Herrera <[EMAIL PROTECTED]> writes:
> Another change that could be done to Dllist is removing the Dllist
> pointer from the Dlelem struct:

I think this is a bad idea.  The patch you propose makes
CatCacheRemoveCTup significantly more expensive (extra hash
calculation).  Moreover, the savings involved is entirely illusory:
palloc chunks are powers of 2, therefore 3 pointers take the same
space as 4.

                        regards, tom lane

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