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Keywords reduced Lassi Kortela (18 Oct 2019 15:24 UTC)
Re: Keywords reduced John Cowan (18 Oct 2019 20:48 UTC)
Re: Keywords reduced Lassi Kortela (18 Oct 2019 22:24 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (19 Oct 2019 08:25 UTC)
Re: Keywords reduced John Cowan (19 Oct 2019 19:04 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (20 Oct 2019 09:15 UTC)
Re: Keywords reduced John Cowan (21 Oct 2019 17:26 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (21 Oct 2019 18:37 UTC)
Re: Keywords reduced Shiro Kawai (21 Oct 2019 19:27 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (22 Oct 2019 06:04 UTC)
Re: Keywords reduced Shiro Kawai (22 Oct 2019 10:07 UTC)
Re: Keywords reduced John Cowan (22 Oct 2019 19:33 UTC)
Re: Keywords reduced John Cowan (22 Oct 2019 19:38 UTC)
Re: Keywords reduced Lassi Kortela (22 Oct 2019 20:06 UTC)
Syntactic keywords vs parentheses Lassi Kortela (22 Oct 2019 20:30 UTC)
Re: Syntactic keywords vs parentheses John Cowan (22 Oct 2019 20:54 UTC)
Re: Syntactic keywords vs parentheses Lassi Kortela (22 Oct 2019 21:07 UTC)
Re: Syntactic keywords vs parentheses Shiro Kawai (22 Oct 2019 22:24 UTC)
Re: Syntactic keywords vs parentheses Lassi Kortela (23 Oct 2019 07:40 UTC)
Re: Syntactic keywords vs parentheses John Cowan (22 Oct 2019 23:12 UTC)
Re: Syntactic keywords vs parentheses Amirouche Boubekki (25 Oct 2019 11:55 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (23 Oct 2019 07:18 UTC)
Re: Keywords reduced John Cowan (21 Oct 2019 23:06 UTC)
Re: Keywords reduced Shiro Kawai (22 Oct 2019 00:42 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (22 Oct 2019 06:12 UTC)
Re: Keywords reduced Lassi Kortela (22 Oct 2019 10:56 UTC)
Re: Keywords reduced Lassi Kortela (20 Oct 2019 09:42 UTC)
Remaining keyword problems Lassi Kortela (29 Oct 2019 17:59 UTC)
allow-other-keys Lassi Kortela (29 Oct 2019 18:29 UTC)
Re: allow-other-keys John Cowan (29 Oct 2019 18:55 UTC)
Re: allow-other-keys Shiro Kawai (29 Oct 2019 19:18 UTC)
Re: allow-other-keys Lassi Kortela (29 Oct 2019 23:04 UTC)
Re: allow-other-keys Marc Feeley (29 Oct 2019 21:05 UTC)
Re: allow-other-keys Marc Nieper-Wißkirchen (03 Nov 2019 08:16 UTC)
Re: allow-other-keys Lassi Kortela (03 Nov 2019 10:11 UTC)
Re: allow-other-keys Marc Nieper-Wißkirchen (03 Nov 2019 10:34 UTC)
Re: allow-other-keys Lassi Kortela (03 Nov 2019 10:54 UTC)
Re: allow-other-keys Marc Nieper-Wißkirchen (03 Nov 2019 11:13 UTC)
Re: allow-other-keys Lassi Kortela (03 Nov 2019 11:39 UTC)
Re: allow-other-keys Arthur A. Gleckler (03 Nov 2019 18:39 UTC)
Re: allow-other-keys Marc Nieper-Wißkirchen (03 Nov 2019 18:47 UTC)
Re: allow-other-keys John Cowan (03 Nov 2019 19:20 UTC)
Re: allow-other-keys John Cowan (03 Nov 2019 19:18 UTC)
Re: allow-other-keys Marc Nieper-Wißkirchen (03 Nov 2019 19:51 UTC)
Re: allow-other-keys John Cowan (03 Nov 2019 22:19 UTC)
Identifier syntax and the range of Schemes to support Lassi Kortela (03 Nov 2019 19:54 UTC)
Re: Remaining keyword problems John Cowan (29 Oct 2019 19:51 UTC)
Re: Remaining keyword problems Lassi Kortela (29 Oct 2019 21:09 UTC)
Alternative syntax using colon symbols for portable keywords Lassi Kortela (29 Oct 2019 22:29 UTC)
Re: Remaining keyword problems Marc Nieper-Wißkirchen (11 Nov 2019 14:56 UTC)
Re: Remaining keyword problems Lassi Kortela (11 Nov 2019 16:15 UTC)
Re: Remaining keyword problems Marc Nieper-Wißkirchen (11 Nov 2019 14:44 UTC)
Re: Remaining keyword problems John Cowan (11 Nov 2019 16:48 UTC)
Re: Remaining keyword problems Marc Nieper-Wißkirchen (11 Nov 2019 17:06 UTC)
Re: Remaining keyword problems John Cowan (11 Nov 2019 17:15 UTC)
Re: Keywords reduced Shiro Kawai (19 Oct 2019 09:25 UTC)
Re: Keywords reduced Lassi Kortela (19 Oct 2019 09:38 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (19 Oct 2019 12:22 UTC)
Re: Keywords reduced Shiro Kawai (19 Oct 2019 18:43 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (20 Oct 2019 08:39 UTC)
Re: Keywords reduced Lassi Kortela (20 Oct 2019 09:28 UTC)
Re: Keywords reduced Shiro Kawai (20 Oct 2019 10:12 UTC)
Re: Keywords reduced Shiro Kawai (20 Oct 2019 10:17 UTC)
Re: Keywords reduced Lassi Kortela (20 Oct 2019 10:22 UTC)
Re: Keywords reduced Shiro Kawai (20 Oct 2019 10:41 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (20 Oct 2019 21:10 UTC)
Re: Keywords reduced Shiro Kawai (20 Oct 2019 21:19 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (20 Oct 2019 21:33 UTC)
Re: Keywords reduced Shiro Kawai (20 Oct 2019 22:05 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (21 Oct 2019 07:01 UTC)
Re: Keywords reduced Shiro Kawai (20 Oct 2019 22:18 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (21 Oct 2019 07:05 UTC)
Re: Keywords reduced Shiro Kawai (21 Oct 2019 07:24 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (20 Oct 2019 21:04 UTC)
Re: Keywords reduced Shiro Kawai (20 Oct 2019 21:41 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (21 Oct 2019 06:49 UTC)
Re: Keywords reduced Shiro Kawai (21 Oct 2019 07:52 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (21 Oct 2019 11:46 UTC)
Re: Keywords reduced Peter Kourzanov (21 Oct 2019 15:42 UTC)
Re: Keywords reduced Marc Nieper-Wißkirchen (21 Oct 2019 15:54 UTC)
Re: Keywords reduced Shiro Kawai (21 Oct 2019 17:38 UTC)
Re: Keywords reduced John Cowan (21 Oct 2019 17:45 UTC)
Re: Keywords reduced Lassi Kortela (22 Oct 2019 08:21 UTC)
Keywords vs paremeters for hygiene Lassi Kortela (21 Oct 2019 08:05 UTC)
Re: Keywords vs paremeters for hygiene Marc Nieper-Wißkirchen (21 Oct 2019 11:22 UTC)

Re: Keywords reduced Lassi Kortela 18 Oct 2019 22:24 UTC

> What implementations did you measure this on?  Chez is a very different
> matter from Chibi.

Only on Chez. On Chibi the slowdown is about 10x, except the 1-arg case
about 30x (it probably optimizes 1-arg calls to ordinary procedures).

The benchmark runs 100K calls. Wouldn't you switch to a faster
implementation for jobs like that?

>> Calling with one or two keywords is 2-10x
>> slower, but you have to do like 100K calls per second for it to matter.
>
> What concerns me is if you have 100 keyword args of which only a few are
> usually supplied at any given time, but then someone comes along and
> supplies all or most of them.

Someone comes along and supplies close to 100 keyword arguments in one
call? Benchmark says calling with 100 kw args 100 times takes 1 second
for Chibi. Chez does it in 0.25 seconds. Both with naive plists.

In real code, more than 10 arguments is getting into
<https://thedailywtf.com/> territory. This is starting to look like
intentionally designing the worst possible way to attack a problem, then
iteratively making it worse. We're not yet at remote procedure calls :)

To me, Lisp keyword args have always had a bit of that "ordering fast
food at 2 AM" vibe. A bit dodgy and you know it, but sometimes the most
expedient option. That's why these attempts to turn it into fine art are
still a bit mystifying to me, though there may be a point to it, just
like there are Michelin-starred restaurants that serve burgers.

> You pointed out in another email that keyword-call is rather long-winded,
> and I agree.  How about changing it to something compact like just a
> colon?  I think this is a clear-cut case where such a short identifier is
> justified.  You will have to make sure that systems accept it as a normal
> identifier and not a malformed keyword.

I haven't checked whether or not a single colon is portable. I'd err on
the side of caution since compatibility with any Scheme is so important.

As a separate concern, recall that we need the keyword args in a
separate sublist as in (keyword-call a b (c d)). This is due to
limitations in syntax-rules pattern matching, and also finding some
other "keyword arguments start here" marker would be hard since we don't
have portable keyword read syntax.

(keyword-call a b (c d)) is already about the maximum amount of
weirdness I'd be comfortable imposing on library programmers who are
just wanting to get a job done and get on with other problems. (: a b (c
d)) is quite a bit of magic in one expression. I guess it could be (: a
b : c d) but that's also quite magic, and can syntax-rules handle it?

A simple alternative would be changing the names to kw-lambda and
kw-call. Or klambda and kcall (maybe "k" is too brief?)