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| dogbert17 | .seen lizmat | 09:35 | |
| tellable6 | dogbert17, I saw lizmat 2021-03-25T14:05:30Z in #moarvm: <lizmat> jnthn: so any idea how many people watched ? | ||
| dogbert17 | m: wordcase("abc def ghi") for ^100_000 | 09:47 | |
| camelia | WARNINGS for <tmp>: Useless use of "wordcase(\"abc def ghi\")" in expression "wordcase(\"abc def ghi\")" in sink context (line 1) |
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| dogbert17 | m: wordcase("abc def ghi") for ^100_000; say now - INIT now; | 09:48 | |
| camelia | WARNINGS for <tmp>: 0.02217478 Useless use of "wordcase(\"abc def ghi\")" in expression "wordcase(\"abc def ghi\")" in sink context (line 1) |
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| dogbert17 | m: "abc def ghi".wordcase for ^100_000; say now - INIT now; | ||
| camelia | 3.9773093 | ||
| dogbert17 | lizmat: any theory as to the timing differences? | ||
| dogbert17 is probably doing something stupid | 09:49 | ||
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| lizmat looks | 10:21 | ||
| looks like the first case is constant folded, the second isn't ? | 10:23 | ||
| dogbert17 ^^ | 10:24 | ||
| dogbert17 | m: my $a = wordcase("abc def ghi") for ^100_000; say now - INIT now; | 10:26 | |
| camelia | 0.03031934 | ||
| dogbert17 | m: my $a = "abc def ghi".wordcase for ^100_000; say now - INIT now; | ||
| camelia | 3.9287443 | ||
| dogbert17 | lizmat: so this is to be expected then? | ||
| lizmat | I'm not saying that: I'm merely stating the current fact :-) | 10:27 | |
| and wordcase is relatively expensive, so the difference is more pronounced | 10:29 | ||
| dogbert17 | I'm looking a bit into differences beteween sub and method form of some routines. In many cases the sub form runs in twice the time compared to the method form | 10:30 | |
| dogbert17 is trying to lure lizmat into doing some cool opts | 10:31 | ||
| lizmat | that might work: wordcase has been on my long list for a while | ||
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| dogbert17 | aha, I'd better keep investigating. Perhaps something else will turn up :) | 10:32 | |
| a quick look at the profiler shows zero GC's vs 288 GC's | 10:34 | ||
| among other things | |||
| lizmat | yeah, the sub version is equivalent to: my $a = 42 for ^100_000 | 10:35 | |
| dogbert17 | now that'll be fast :) | 10:36 | |
| MasterDuke | interesting. because the sub just calls the method on the argument | ||
| dogbert17 | that is indeed interesting | 10:37 | |
| lizmat | "wordcase" is marked "is pure" | 10:42 | |
| so open to optimization of a given input | 10:43 | ||
| *static | |||
| so I think the optimizer then just runs the wordcase("abc") at optimize time, and WVals the result | 10:44 | ||
| MasterDuke | huh. rakudo only has a single method marked 'is pure' (`src/core.c/Str.pm6:841: method !hexify(str $char) is pure {`) | 10:46 | |
| but 156 subs | 10:47 | ||
| lizmat | I'm not sure it even makes sense on methods ? | ||
| sena_kun | Was there an RSC meeting last week? | 11:59 | |
| lizmat | yes, there was | 12:00 | |
| sena_kun | I see no "minutes" note posted, but glad it was. | ||
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| nine | From IO::Handle docs: "Using getc to get a single keypress from a terminal will only work properly if you've set the terminal to "unbuffered"." | 13:36 | |
| Good hint! No how would one do that exactly? | |||
| leont | Didn't someone (gfldex?) file an issue recently along the lines of "when should support argumented blocks? Or was that just a suggestion on his blogpost. | 13:55 | |
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| japhb | nine: I think I answered this recently, let me go see if it was in a logged channel. | 17:20 | |
| Yeah, here: colabti.org/irclogger/irclogger_lo...03-17#l557 | 17:22 | ||
| lizmat just pushed github.com/rakudo/rakudo/commit/5d...e023d82829 # dogbert17 | 17:46 | ||
| "Make Str.wordcase about 5x as fast" | 17:50 | ||
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| japhb | Commit descriptions like that just warm my heart. :-) | 17:56 | |
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| gfldex | leont: I mentioned it in my blog and jnthn picked up on it in 6guts.wordpress.com/2021/03/15/tow...in-moarvm/ . | 22:46 | |
| leont: Close to the bottom of his post. | |||
| leont | That explains why I couldn't find it, that's not where I was looking | 22:48 | |
| Though it's not entirely what I meant. Even without new dispatching I'd really like to be able to rename $_ to something clearer, based on the knowledge of the match | 23:31 | ||