#racket on 2020-03-31 — irc logs at freenode.irclog.whitequark.org

2020-02-20 18:27 samth changed the topic of #racket to: Racket v7.6 has been released: https://blog.racket-lang.org/2020/02/racket-v7-6.html -- Racket -- https://racket-lang.org -- https://pkgs.racket-lang.org -- Paste at http://pasterack.org

00:00 <true-grue> In a process of lowering the compiler changes the code as here: "g(expr1, expr2, expr3)" to "t1 = expr1; t2 = expr2; t3 = expr3; g(t1, t2, t3)". But you can't make any assumptions about the order of evaluation of expr1, expr2, and expr3 here. Especially when the compiler runs such passes as instruction scheduling.

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00:21 <aeth> on package counting... there's an additional 278 portable r6rs/r7rs packages. https://akkuscm.org/packages/

00:23 <aeth> that doesn't include most of the 140 SRFIs, so it's possible that there are also a bunch of SRFIs out there that are portable, but in neither package manager

00:26 <aeth> that's r6rs+r7rs, this is r7rs: http://snow-fort.org/pkg/

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00:57 <jcowan> Not only possible but actual.

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12:44 <Xophmeister> Say I have a function that takes a lot of keyword arguments, is there an better way to define a contract for that function without simply listing out all the arguments again?

12:48 <Xophmeister> (important detail: all those keyword arguments have the same contract)

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13:57 <samth> Xophmeister: you could write a function to generate the contract

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14:34 <samth> jcowan: Chez does not fix an order of evaluation; this is one of the differences that required work to implement

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18:56 <srandon111> guys how is racket in terms of performance?

18:57 <bremner> it depends (TM)

18:58 <bremner> srandon111: what are you comparing to, and what is your workload / application?

19:02 <samth> srandon111: it's much faster than most "dynamic languages" like python and ruby, somewhat slower than JS and Java, similar to Clojure

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19:14 <bremner> even compared to pypy? ;P

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19:42 <srandon111> compared to bf?

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20:38 <samth> bremner: Racket is in the same ballpark as pypy performance but individual programs will vary very widely in that comparison

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