From: "Mattias Engdegård" <mattias.engdegard@gmail.com>
To: Stefan Kangas <stefankangas@gmail.com>
Cc: Stefan Monnier <monnier@iro.umontreal.ca>, 66816@debbugs.gnu.org
Subject: bug#66816: [PATCH] Delete redundant lambdas around unary functions
Date: Sun, 29 Oct 2023 20:03:16 +0100 [thread overview]
Message-ID: <1F4EC90D-4A07-4B24-B699-5AC1CC6A8408@gmail.com> (raw)
In-Reply-To: <CADwFkmmvSJuoJrnAPnLWhr-LRmGHk9=XjpqNi-mD=00iEQs=sA@mail.gmail.com>
> I've been able to measure around 10% better performance in the few cases
> I looked into. Here's an example:
>
> (benchmark-run 1000
> (seq-filter (lambda (n) (bufferp n))
> (number-sequence 0 100000)))
(This would be less of a problem if we could inline functions on the Lisp level...)
We could also have the compiler η-reduce automatically. I investigated this very briefly some time ago. Maybe I can dig up the patch.
One problem is that the arity isn't necessarily preserved. Most of the time this isn't a problem but it could be something to watch out for if doing the η-reduction by hand.
next prev parent reply other threads:[~2023-10-29 19:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-29 13:02 bug#66816: [PATCH] Delete redundant lambdas around unary functions Stefan Kangas
2023-10-29 19:03 ` Mattias Engdegård [this message]
2023-10-29 21:55 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-10-30 8:56 ` Mattias Engdegård
2023-10-30 15:00 ` Mattias Engdegård
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