Groups > comp.lang.python > #197519

Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited)

From	Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups	comp.lang.python
Subject	Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited)
Date	2025-06-16 01:14 +0000
Organization	A noiseless patient Spider
Message-ID	<102nr5q$17pa6$2@dont-email.me> (permalink)
References	(3 earlier) <87y0tt23uh.fsf@nightsong.com> <102la8c$l3km$5@dont-email.me> <87tt4g21nr.fsf@nightsong.com> <102nc7v$14c9g$1@dont-email.me> <87plf41yhj.fsf@nightsong.com>

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On Sun, 15 Jun 2025 14:33:28 -0700, Paul Rubin wrote:

> Lawrence D'Oliveiro <ldo@nz.invalid> writes:
>>
>>> Let's see how CPython holds up with a million OS threads running.
>>
>> Linux can already run hundreds of thousands of processes/threads
> 
> To misquote Austin Powers, "one MILLLLLION threads".  Here Erlang does
> it in less than 1GB of memory:
> 
> https://hauleth.dev/post/beam-process-memory-usage/

Just a note that Erlang dates from before the current state of CPU 
architectures, where you have a 100:1 disparity between RAM-access speeds 
and CPU register-access speeds.

In other words, you do not want to copy stuff between processes if you can 
help it. With threads sharing common memory, that data can reside in 
caches that multiple threads in the same process context can share without 
copying.

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Thread

Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-14 04:11 +0000
  Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Paul Rubin <no.email@nospam.invalid> - 2025-06-14 04:29 -0700
    Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-14 23:10 +0000
      Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Paul Rubin <no.email@nospam.invalid> - 2025-06-14 18:25 -0700
        Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-15 02:13 +0000
          Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Paul Rubin <no.email@nospam.invalid> - 2025-06-15 13:24 -0700
            Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-15 20:59 +0000
              Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Paul Rubin <no.email@nospam.invalid> - 2025-06-15 14:33 -0700
                Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-16 01:14 +0000
                Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Paul Rubin <no.email@nospam.invalid> - 2025-06-15 21:02 -0700
                Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-17 02:12 +0000
  Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Mild Shock <janburse@fastmail.fm> - 2025-06-14 23:23 +0200
    async I/O via threads is extremly slow (Was: Does Python Need Virtual Threads?) Mild Shock <janburse@fastmail.fm> - 2025-06-23 13:29 +0200
      What does stats = await asyncio.to_thread(os.stat, url) do? (Was async I/O via threads is extremly slow) Mild Shock <janburse@fastmail.fm> - 2025-06-24 00:32 +0200
        What does the Async Detour usually cost (Was: What does stats = await asyncio.to_thread(os.stat, url) do?) Mild Shock <janburse@fastmail.fm> - 2025-06-24 00:42 +0200
          Which Python System is affected? (Was: What does the Async Detour usually cost) Mild Shock <janburse@fastmail.fm> - 2025-06-24 00:48 +0200
            Schachner, Joseph was the Big Moron [September 2021 16:30] (Was: Which Python System is affected?) Mild Shock <janburse@fastmail.fm> - 2025-06-24 08:53 +0200

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