Re: What to do for faster `remove-duplicates'?

[Oleh Krehel]

Artur Malabarba <address@hidden> writes:

>> I attach the patch. I did a bunch of `benchmark-run' and it seems that
>> 100 elements is the breaking point.
>
> Small question. How much slower is this patch compared to the current
> version on a list of 99 elements? (Due to having to calculate the
> length)

For 99 unique candidates, the call to `length' takes 5% time compared to
the call to `delete-dups':

(/ 3.774e-06 6.3028e-05)
0.05987814939392017

It becomes worse for a small amount of unique candidates, going to 30%
for 10 candidates, but a lot of that is the standard cost of calling a
function.

I don't know if it's worth optimizing further.

Oleh