From mboxrd@z Thu Jan  1 00:00:00 1970
From: Adam Porter <adam@alphapapa.net>
Subject: Re: org-mode functional programming library
Date: Tue, 04 Feb 2020 01:43:20 -0600
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References: <87o8uxellj.fsf@yavin4.ch> <87o8uict20.fsf@nicolasgoaziou.fr>
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Nicolas Goaziou <mail@nicolasgoaziou.fr> writes:

> Note that, at some point, Org will support "seq.el", i.e., when we
> drop support for Emacs 24.

Just a small FYI about seq.el, for those who may not be aware: while
it's a very useful library, it can be quite slow since it uses generics.
For example, here are some benchmarks comparing seq-intersection with
other functions that intersect lists:

https://gist.github.com/alphapapa/36b117c178dec677258f372c3a01d8b5

Note the last benchmark listed, which shows that cl-intersection is
about 2x as fast as seq-intersection.  As well, dash.el's -intersection
is about 17x faster than seq-intersection.

So while seq.el will undoubtedly be useful in Org, it should be used
carefully with regard to performance.  Type-specific functions will
generally be much faster.  And as long as dash.el can't be used in Org
proper, a custom implementation may be called for at times.