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Groups > comp.os.vms > #378412
| From | cross@spitfire.i.gajendra.net (Dan Cross) |
|---|---|
| Newsgroups | comp.os.vms |
| Subject | Re: DCL2 |
| Date | 2025-12-18 15:03 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <10i154t$h6p$1@reader2.panix.com> (permalink) |
| References | <10h055c$217jf$1@dont-email.me> <10ht0rk$34qt0$2@dont-email.me> <10huned$jc8$2@reader2.panix.com> <10hvmbb$3uroi$2@dont-email.me> |
In article <10hvmbb$3uroi$2@dont-email.me>, Arne Vajhøj <arne@vajhoej.dk> wrote: >On 12/17/2025 11:57 AM, Dan Cross wrote: >> In article <10ht0rk$34qt0$2@dont-email.me>, >> Arne Vajhøj <arne@vajhoej.dk> wrote: >>> On 12/16/2025 9:05 AM, Dan Cross wrote: >>>> Python is interpreted, yes, but people who are using it to do >>>> numerical analysis are often using the jit-compiled variant, >>> >>> Most still use CPython. >> >> In your world of enterprise IT? Sure. >> >> For numerical analysis? Directly in Python? No. >> >>> None of the JIT implementations PyPy, GraalPy, Codon etc. has >>> really gotten traction. > >>> Reason: fear of compatibility issues combined with the fact that >>> JIT usually does not matter. >>> >>> Because: >>> >>>> and >>>> more often the actual heavy computational lifting is being done >>>> in a library that's exposed to Python via an FFI; so the actual >>>> training code is in Fortran or C or some more traditional >>>> compiled language. >>> >>> If CPython interpretation use 0.1-1.0% of total CPU usage >>> and native library execution use 99.0-99.9% of total CPU usage, >>> then ... >> >> See above. I'm talking about software that's doing numerical >> analysis directly in Python, _not_ via FFI. > >But practically nobody does that. I haven't seen any evidence that suggests you are really in a position to know that one way or the other. On the other hand, I have direct, first-hand knowledge of people who are doing just that. >By using the high level packages (pandas, polars, >tensorflow, pytorch, numpy, scipy etc.) they can >do what they need to do using much higher level >constructs. No need to fiddle with LAPACK, BLAS, >matrix multiplication and inversion algorithms. > >And on top of having to deal with much less >much higher level code they get way better >performance. The standard libraries are >much faster than custom Python code even >if it is JIT compiled. > >Nobody want to write 5-10 times more lines >of code to run 5-10 times slower. Sorry, but if you want to make a statement about some aspect of the field that you just aren't involved in, you really need some evidence to back it up, not just your intuition. - Dan C.
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DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-05 21:41 -0500
Re: DCL2 Marc Van Dyck <marc.gr.vandyck@invalid.skynet.be> - 2025-12-06 11:42 +0100
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-06 10:33 -0500
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-06 10:57 -0500
Re: DCL2 Chris Townley <news@cct-net.co.uk> - 2025-12-06 16:12 +0000
Re: DCL2 kludge@panix.com (Scott Dorsey) - 2025-12-06 14:45 -0500
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-06 15:23 -0500
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-06 15:47 -0500
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-07 12:03 -0500
Re: [Info-vax] DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-07 12:09 -0500
Re: DCL2 Chris Townley <news@cct-net.co.uk> - 2025-12-07 14:18 +0000
Re: DCL2 kludge@panix.com (Scott Dorsey) - 2025-12-07 10:03 -0500
Re: DCL2 cross@spitfire.i.gajendra.net (Dan Cross) - 2025-12-08 20:13 +0000
Re: [Info-vax] DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-06 15:41 -0500
Re: DCL2 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-14 01:45 +0000
Re: DCL2 antispam@fricas.org (Waldek Hebisch) - 2025-12-15 01:51 +0000
Re: DCL2 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-15 02:56 +0000
Re: DCL2 cross@spitfire.i.gajendra.net (Dan Cross) - 2025-12-15 16:37 +0000
Re: DCL2 jgd@cix.co.uk (John Dallman) - 2025-12-15 19:37 +0000
Re: DCL2 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-15 22:59 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-15 11:58 -0500
Re: DCL2 "Craig A. Berry" <craigberry@nospam.mac.com> - 2025-12-06 15:28 -0600
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-06 18:46 -0500
Re: DCL2 "Craig A. Berry" <craigberry@nospam.mac.com> - 2025-12-07 07:17 -0600
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-07 11:07 -0500
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-07 11:13 -0500
Re: DCL2 steve sparrow <sdsparrow@aol.com> - 2025-12-08 11:14 -0600
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-08 19:07 -0500
Re: DCL2 cross@spitfire.i.gajendra.net (Dan Cross) - 2025-12-16 14:05 +0000
Re: DCL2 "Craig A. Berry" <craigberry@nospam.mac.com> - 2025-12-16 15:20 -0600
Re: DCL2 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-16 21:59 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-16 20:17 -0500
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-16 20:42 -0500
Re: DCL2 "Craig A. Berry" <craigberry@nospam.mac.com> - 2025-12-17 07:19 -0600
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-18 09:46 -0500
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-18 09:44 -0500
Re: DCL2 cross@spitfire.i.gajendra.net (Dan Cross) - 2025-12-17 16:55 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-16 20:26 -0500
Re: DCL2 cross@spitfire.i.gajendra.net (Dan Cross) - 2025-12-17 16:57 +0000
SIMH + OpenVMS 5.5-2H4 standalone BACKUP: ISO appears as DJAx not DUAx flexmcmurphy <plica2006@gmail.com> - 2025-12-17 23:00 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-17 20:45 -0500
Re: DCL2 cross@spitfire.i.gajendra.net (Dan Cross) - 2025-12-18 15:03 +0000
Re: DCL2 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-14 01:41 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-15 11:59 -0500
Re: DCL2 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-15 23:01 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-15 19:28 -0500
Re: DCL2 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-16 01:24 +0000
Re: DCL2 Sam Thomas <sam@noneya.com> - 2025-12-16 17:38 +0000
Re: DCL2 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-16 22:07 +0000
Re: DCL2 Sam Thomas <sam@noneya.com> - 2025-12-17 14:52 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-17 20:34 -0500
Re: DCL2 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-18 02:31 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-17 21:40 -0500
Re: DCL2 Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2025-12-08 14:12 +0000
Re: DCL2 Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2025-12-08 14:23 +0000
Re: DCL2 bill <bill.gunshannon@gmail.com> - 2025-12-08 15:42 -0500
Re: DCL2 cross@spitfire.i.gajendra.net (Dan Cross) - 2025-12-10 20:50 +0000
Re: DCL2 Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2025-12-11 13:11 +0000
Re: DCL2 cross@spitfire.i.gajendra.net (Dan Cross) - 2025-12-11 16:22 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-08 19:58 -0500
Re: DCL2 Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2025-12-09 13:31 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-08 20:35 -0500
Re: DCL2 Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2025-12-09 13:55 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-09 20:08 -0500
Re: DCL2 Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2025-12-10 14:14 +0000
Re: DCL2 Mark Berryman <mark@theberrymans.com> - 2025-12-13 11:27 -0700
Re: DCL2 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-12-14 01:31 +0000
Re: DCL2 Arne Vajhøj <arne@vajhoej.dk> - 2025-12-15 11:48 -0500
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