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Re: remove-duplicates performances

From: Stefan Monnier
Subject: Re: remove-duplicates performances
Date: Fri, 20 May 2011 15:01:07 -0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

>> Yes, i understand that, what i mean is you have to write a predicate
>> each time, which could be inconvenient, instead of using :test 'equal.
> With all due respect, you are proposing a hashtable as an alternate
> mechanism.  A hashtable requires a hash function and an equality test.

We do have a built-in hash function that corresponds to the `equal'
equality test, as well as one for the `eq' equality test.

Total ordering predicates consistent with `eq' or `equal' OTOH are not
currently provided, so the use of `sort' requires extra work.


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